Routing and Remote Access Error Codes

The following Routing and Remote Access (RRAS) API error codes are defined in raserror.h. All error codes are supported in Windows 2000 or later versions of Windows unless specified otherwise.

Symbolic	Code	Description
PENDING	600	An operation is pending.
ERROR_INVALID_PORT_HANDLE	601	The port handle supplied is not valid.
ERROR_PORT_ALREADY_OPEN	602	The specified port is already open.
ERROR_BUFFER_TOO_SMALL	603	The buffer supplied is too small.
ERROR_WRONG_INFO_SPECIFIED	604	The port information specified is incorrect.
ERROR_CANNOT_SET_PORT_INFO	605	The port information specified cannot be set. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_PORT_NOT_CONNECTED	606	The port specified is not connected.
ERROR_EVENT_INVALID	607	An event that is not valid was detected. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_DEVICE_DOES_NOT_EXIST	608	The specified device does not exist.
ERROR_DEVICETYPE_DOES_NOT_EXIST	609	The specified device type does not exist.
ERROR_BUFFER_INVALID	610	The buffer supplied is not valid.
ERROR_ROUTE_NOT_AVAILABLE	611	A route was specified that is not available. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_ROUTE_NOT_ALLOCATED	612	The specified route is not allocated.
ERRERROR_INVALID_COMPRESSION_SPECIFIED	613	The specified compression is not valid. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_OUT_OF_BUFFERS	614	There were insufficient buffers available.
ERROR_PORT_NOT_FOUND	615	The specified port was not found.
ERROR_ASYNC_REQUEST_PENDING	616	An asynchronous request is pending.
ERROR_ALREADY_DISCONNECTING	617	The specified port or device is already disconnecting.
ERROR_PORT_NOT_OPEN	618	The specified port is not open.
ERROR_PORT_DISCONNECTED	619	The specified port is disconnected.
ERROR_NO_ENDPOINTS	620	No endpoints could be determined. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_CANNOT_OPEN_PHONEBOOK	621	Cannot open the specified phone book file.
ERROR_CANNOT_LOAD_PHONEBOOK	622	Cannot load the specified phone book file.
ERROR_CANNOT_FIND_PHONEBOOK_ENTRY	623	Cannot find the specified phone book entry.
ERROR_CANNOT_WRITE_PHONEBOOK	624	Cannot write to the specified phone book file.
ERROR_CORRUPT_PHONEBOOK	625	Information found in the specified phone book is not valid.
ERROR_CANNOT_LOAD_STRING	626	A string could not be loaded. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_KEY_NOT_FOUND	627	Cannot find the specified key.
ERROR_DISCONNECTION	628	The specified port was disconnected.
ERROR_REMOTE_DISCONNECTION	629	The specified port was disconnected by the remote computer.
ERROR_HARDWARE_FAILURE	630	The specified port was disconnected due to hardware failure.
ERROR_USER_DISCONNECTION	631	The specified port was disconnected by the user.
ERROR_INVALID_SIZE	632	Incorrect structure size.
ERROR_PORT_NOT_AVAILABLE	633	The specified port is already in use or is not configured for remote access dial-out.
ERROR_CANNOT_PROJECT_CLIENT	634	Your computer could not be registered on the remote network. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_UNKNOWN	635	An unknown error has occurred.
ERROR_WRONG_DEVICE_ATTACHED	636	The wrong device is attached to the specified port.
ERROR_BAD_STRING	637	A string was detected that could not be converted. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_REQUEST_TIMEOUT	638	The request has timed out.
ERROR_CANNOT_GET_LANA	639	No asynchronous net is available. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_NETBIOS_ERROR	640	An error has occurred involving NetBIOS. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_SERVER_OUT_OF_RESOURCES	641	he server cannot allocate NetBIOS resources needed to support the client. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_NAME_EXISTS_ON_NET	642	One of your computer's NetBIOS names is already registered on the remote network. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_SERVER_GENERAL_NET_FAILURE	643	A network adapter at the server failed. Note: Deprecated in Windows Vista and later versions of Windows.
WARNING_MSG_ALIAS_NOT_ADDED	644	You will not receive network message popups. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_AUTH_INTERNAL	645	An internal authentication error has occurred.
ERROR_RESTRICTED_LOGON_HOURS	646	The specified account is not permitted to log in at this time of day.
ERROR_ACCT_DISABLED	647	The specified account is disabled.
ERROR_PASSWD_EXPIRED	648	The specified password has expired.
ERROR_NO_DIALIN_PERMISSION	649	The specified account does not have remote access permissions.
ERROR_SERVER_NOT_RESPONDING	650	The remote access server is not responding. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_FROM_DEVICE	651	Your modem or other connection device has reported an error.
ERROR_UNRECOGNIZED_RESPONSE	652	An unrecognized response was returned by the device.
ERROR_MACRO_NOT_FOUND	653	A macro required by the device was not found in the device .INF file section.
ERROR_MACRO_NOT_DEFINED	654	A command or response in the device .INF file section refers to an undefined macro.
ERROR_MESSAGE_MACRO_NOT_FOUND	655	The <message> macro was not found in the device .INF file section.
ERROR_DEFAULTOFF_MACRO_NOT_FOUND	656	The <defaultoff> macro in the device .INF file section contains an undefined macro.
ERROR_FILE_COULD_NOT_BE_OPENED	657	The device .INF file could not be opened.
ERROR_DEVICENAME_TOO_LONG	658	The device name in the device .INF or media .INI file is too long.
ERROR_DEVICENAME_NOT_FOUND	659	The media .INI file refers to an unknown device name.
ERROR_NO_RESPONSES	660	The device .INF file contains no responses for the command.
ERROR_NO_COMMAND_FOUND	661	The device .INF file is missing a command.
ERROR_WRONG_KEY_SPECIFIED	662	Attempted to set a macro not listed in device .INF file section.
ERROR_UNKNOWN_DEVICE_TYPE	663	The media .INI file refers to an unknown device type.
ERROR_ALLOCATING_MEMORY	664	Cannot allocate memory.
ERROR_PORT_NOT_CONFIGURED	665	The port is not configured for remote access.
ERROR_DEVICE_NOT_READY	666	Your modem or other connection device is not functioning.
ERROR_READING_INI_FILE	667	Cannot read the media .INI file.
ERROR_NO_CONNECTION	668	The connection was dropped.
ERROR_BAD_USAGE_IN_INI_FILE	669	The usage parameter in the media .ini file is not valid.
ERROR_READING_SECTIONNAME	670	Cannot read the section name from the media .INI file.
ERROR_READING_DEVICETYPE	671	Cannot read the device type from the media .INI file.
ERROR_READING_DEVICENAME	672	Cannot read the device name from the media .INI file.
ERROR_READING_USAGE	673	Cannot read the usage from the media .INI file.
ERROR_READING_MAXCONNECTBPS	674	The system was unable to read the maximum carrier connection speed from the media .INI file. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_READING_MAXCARRIERBPS	675	Cannot read the usage from the media .INI file.
ERROR_LINE_BUSY	676	The line is busy.
ERROR_VOICE_ANSWER	677	A person answered instead of a modem.
ERROR_NO_ANSWER	678	There is no answer.
ERROR_NO_CARRIER	679	Cannot detect a carrier signal.
ERROR_NO_DIALTONE	680	There is no dial tone.
ERROR_IN_COMMAND	681	The modem (or other connecting device) reported a general error. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_WRITING_SECTIONNAME	682	There was an error in writing the section name.
ERROR_WRITING_DEVICETYPE	683	There was an error in writing the device type.
ERROR_WRITING_DEVICENAME	684	There was an error in writing the device name.
ERROR_WRITING_MAXCONNECTBPS	685	There was an error in writing the maximum connection speed.
ERROR_WRITING_MAXCARRIERBPS	686	There was an error in writing the maximum carrier speed.
ERROR_WRITING_USAGE	687	There was an error in writing the usage.
ERROR_WRITING_DEFAULTOFF	688	There was an error in writing the default-off.
ERROR_READING_DEFAULTOFF	689
ERROR_EMPTY_INI_FILE	690	The media .INI file is empty.
ERROR_AUTHENTICATION_FAILURE	691	Access denied because the user name, password, or both is not valid on the domain.
ERROR_PORT_OR_DEVICE	692	A hardware failure has occurred in the port or attached device
ERROR_NOT_BINARY_MACRO	693	The macro is not a binary macro.
ERROR_DCB_NOT_FOUND	694	DCB not found.
ERROR_STATE_MACHINES_NOT_STARTED	695	State machines are not started.
ERROR_STATE_MACHINES_ALREADY_STARTED	696	State machines are already started.
ERROR_PARTIAL_RESPONSE_LOOPING	697	Partial response looping.
ERROR_UNKNOWN_RESPONSE_KEY	698	A response key name in the device .INF file is not in the expected format.
ERROR_RECV_BUF_FULL	699	The device response caused a buffer overflow.
ERROR_CMD_TOO_LONG	700	The expanded command in the device .INF file is too long.
ERROR_UNSUPPORTED_BPS	701	The device moved to a connection speed that is not supported by the COM driver.
ERROR_UNEXPECTED_RESPONSE	702	Device response received when none expected.
ERROR_INTERACTIVE_MODE	703	An error occurred because the interactive mode is enabled.
ERROR_BAD_CALLBACK_NUMBER	704	A bad callback number was specified.
ERROR_INVALID_AUTH_STATE	705	The specified authentication state is not valid.
ERROR_WRITING_INITBPS	706	An error occurred when writing the initial connection speed. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_X25_DIAGNOSTIC	707	An X.25 diagnostic indication was received.
ERROR_ACCT_EXPIRED	708	The specified account has expired.
ERROR_CHANGING_PASSWORD	709	An error occurred while attempting to change the password on the domain.
ERROR_OVERRUN	710	Serial overrun errors were detected while communicating with your modem.
ERROR_RASMAN_CANNOT_INITIALIZE	711	RasMan initialization failure. Check the event log.
ERROR_BIPLEX_PORT_NOT_AVAILABLE	712	The two-way port is initializing. Wait a few seconds and redial. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_NO_ACTIVE_ISDN_LINES	713	No active ISDN lines are available.
ERROR_NO_ISDN_CHANNELS_AVAILABLE	714	No ISDN channels are available to make the call. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_TOO_MANY_LINE_ERRORS	715	Too many errors occurred because of poor phone line quality. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_IP_CONFIGURATION	716	The remote access IP configuration is unusable.
ERROR_NO_IP_ADDRESSES	717	No IP addresses are available in the static pool of remote access IP addresses.
ERROR_PPP_TIMEOUT	718	A PPP timeout occurred.
ERROR_PPP_REMOTE_TERMINATED	719	The connection was terminated by the remote computer. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_PPP_NO_PROTOCOLS_CONFIGURED	720	No PPP control protocols are configured.
ERROR_PPP_NO_RESPONSE	721	The remote PPP peer is not responding.
ERROR_PPP_INVALID_PACKET	722	The PPP packet is not valid.
ERROR_PHONE_NUMBER_TOO_LONG	723	The phone number, including the prefix and suffix, is too long.
ERROR_IPXCP_NO_DIALOUT_CONFIGURED	724	The IPX protocol cannot dial out on the modem (or other connecting device) because this computer is not configured for dialing out (it is an IPX router). Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_IPXCP_NO_DIALIN_CONFIGURED	725	The IPX protocol cannot dial in on the modem (or other connecting device) because this computer is not configured for dialing in (the IPX router is not installed). Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_IPXCP_DIALOUT_ALREADY_ACTIVE	726	The IPX protocol cannot be used for dial-out on more than one port at a time.
ERROR_ACCESSING_TCPCFGDLL	727	Cannot access TCPCFG.DLL. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_NO_IP_RAS_ADAPTER	728	Cannot find an IP adapter bound to remote access.
ERROR_SLIP_REQUIRES_IP	729	SLIP cannot be used unless the IP protocol is installed.
ERROR_PROJECTION_NOT_COMPLETE	730	Computer registration is not complete. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_PROTOCOL_NOT_CONFIGURED	731	The specified protocol is not configured.
ERROR_PPP_NOT_CONVERGING	732	The PPP negotiation is not converging.
ERROR_PPP_CP_REJECTED	733	the PPP control protocol for the specified network protocol is not available on the server.
ERROR_PPP_LCP_TERMINATED	734	The PPP link control protocol was terminated.
ERROR_PPP_REQUIRED_ADDRESS_REJECTED	735	The requested address was rejected by the server.
ERROR_PPP_NCP_TERMINATED	736	The remote computer terminated the control protocol.
ERROR_PPP_LOOPBACK_DETECTED	737	Loopback detected.
ERROR_PPP_NO_ADDRESS_ASSIGNED	738	The server did not assign an address.
ERROR_CANNOT_USE_LOGON_CREDENTIALS	739	The remote server cannot use the Windows NT encrypted password.
ERROR_TAPI_CONFIGURATION	740	The TAPI devices configured for remote access failed to initialize or were not installed correctly.
ERROR_NO_LOCAL_ENCRYPTION	741	The local computer does not support encryption.
ERROR_NO_REMOTE_ENCRYPTION	742	The remote server does not support encryption.
ERROR_REMOTE_REQUIRES_ENCRYPTION	743	The remote computer requires data encryption. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_IPXCP_NET_NUMBER_CONFLICT	744	The system cannot use the IPX network number assigned by the remote computer. Additional information is provided in the event log. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_INVALID_SMM	745	The Session Management Module (SMM) is not valid. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_SMM_UNINITIALIZED	746	The SMM is uninitialized. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_NO_MAC_FOR_PORT	747	No MAC for port. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_SMM_TIMEOUT	748	The SMM timed out. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_BAD_PHONE_NUMBER	749	A bad phone number was specified.
ERROR_WRONG_MODULE	750	The wrong SMM was specified. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_INVALID_CALLBACK_NUMBER	751	The callback number contains a character that is not valid. Only the following 18 characters are allowed: 0 to 9, T, P, W, (, ), -, @, and space. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_SCRIPT_SYNTAX	752	A syntax error was encountered while processing a script.
ERROR_HANGUP_FAILED	753	The connection could not be disconnected because it was created by the multi-protocol router.
ERROR_BUNDLE_NOT_FOUND	754	The system could not find the multi-link bundle.
ERROR_CANNOT_DO_CUSTOMDIAL	755	The system cannot perform automated dial because this connection has a custom dialer specified.
ERROR_DIAL_ALREADY_IN_PROGRESS	756	This connection is already being dialed.
ERROR_RASAUTO_CANNOT_INITIALIZE	757	RAS could not be started automatically. Additional information is provided in the event log.
ERROR_CONNECTION_ALREADY_SHARED	758	Internet Connection Sharing (ICS) is already enabled on the connection. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_SHARING_CHANGE_FAILED	759	An error occurred while the existing Internet Connection Sharing settings were being changed. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_SHARING_ROUTER_INSTALL	760	An error occurred while routing capabilities were being enabled. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_SHARE_CONNECTION_FAILED	761	An error occurred while Internet Connection Sharing was being enabled for the connection. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_CANNOT_SHARE_CONNECTION	763	Internet Connection Sharing cannot be enabled. There is more than one LAN connection other than the connection to be shared. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_NO_SMART_CARD_READER	764	No smart card reader is installed.
ERROR_SHARING_ADDRESS_EXISTS	765	Internet Connection Sharing cannot be enabled. A LAN connection is already configured with the IP address that is required for automatic IP addressing.
ERROR_NO_CERTIFICATE	766	A certificate could not be found. Connections that use the L2TP protocol over IPSec require the installation of a machine certificate, also known as a computer certificate.
ERROR_SHARING_MULTIPLE_ADDRESSES	767	Internet Connection Sharing cannot be enabled. The LAN connection selected as the private network has more than one IP address configured. Please reconfigure the LAN connection with a single IP address before enabling Internet Connection Sharing.
ERROR_FAILED_TO_ENCRYPT	768	The connection attempt failed because of failure to encrypt data.
ERROR_BAD_ADDRESS_SPECIFIED	769	The specified destination is not reachable.
ERROR_CONNECTION_REJECT	770	The remote computer rejected the connection attempt.
ERROR_CONGESTION	771	The connection attempt failed because the network is busy.
ERROR_INCOMPATIBLE	772	The remote computer's network hardware is incompatible with the type of call requested.
ERROR_NUMBERCHANGED	773	The connection attempt failed because the destination number has changed.
ERROR_TEMPFAILURE	774	The connection attempt failed because of a temporary failure. Try connecting again.
ERROR_BLOCKED	775	The call was blocked by the remote computer.
ERROR_DONOTDISTURB	776	The call could not be connected because the remote computer has invoked the Do Not Disturb feature.
ERROR_OUTOFORDER	777	The connection attempt failed because the modem or other connection device on the remote computer is out of order.
ERROR_UNABLE_TO_AUTHENTICATE_SERVER	778	It was not possible to verify the identity of the server.
ERROR_SMART_CARD_REQUIRED	779	To dial out using this connection you must use a smart card. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_INVALID_FUNCTION_FOR_ENTRY	780	An attempted function is not valid for this connection.
ERROR_CERT_FOR_ENCRYPTION_NOT_FOUND	781	The encryption attempt failed because no valid certificate was found. Note: Deprecated in Windows Vista and later versions of Windows.
ERROR_SHARING_RRAS_CONFLICT	782	Connection Sharing (NAT) is currently installed as a routing protocol, and must be removed before enabling Internet Connection Sharing.
ERROR_SHARING_NO_PRIVATE_LAN	783	Internet Connection Sharing cannot be enabled. The LAN connection selected as the private network is either not present, or is disconnected from the network. Please ensure that the LAN adapter is connected before enabling Internet Connection Sharing.
ERROR_NO_DIFF_USER_AT_LOGON	784	You cannot dial using this connection at login time because it is configured to use a user name different than the one on the smart card. If you want to use this connection at login time, you must configure it to use the user name on the smart card.
ERROR_NO_REG_CERT_AT_LOGON	785	You cannot dial using this connection at login time because it is not configured to use a smart card. If you want to use it at login time, you must edit the properties of this connection so that it uses a smart card.
ERROR_OAKLEY_NO_CERT	786	The L2TP connection attempt failed because there is no valid machine certificate on your computer for security authentication.
ERROR_OAKLEY_AUTH_FAIL	787	The L2TP connection attempt failed because the security layer could not authenticate the remote computer.
ERROR_OAKLEY_ATTRIB_FAIL	788	The L2TP connection attempt failed because the security layer could not negotiate compatible parameters with the remote computer.
ERROR_OAKLEY_GENERAL_PROCESSING	789	The L2TP connection attempt failed because the security layer encountered a processing error during initial negotiations with the remote computer.
ERROR_OAKLEY_NO_PEER_CERT	790	The L2TP connection attempt failed because certificate validation on the remote computer failed.
ERROR_OAKLEY_NO_POLICY	791	The L2TP connection attempt failed because security policy for the connection was not found.
ERROR_OAKLEY_TIMED_OUT	792	The L2TP connection attempt failed because security negotiation timed out.
ERROR_OAKLEY_ERROR	793	The L2TP connection attempt failed because an error occurred while negotiating security.
ERROR_UNKNOWN_FRAMED_PROTOCOL	794	The Framed Protocol RADIUS attribute for this user is not PPP.
ERROR_WRONG_TUNNEL_TYPE	795	The Tunnel Type RADIUS attribute for this user is not correct.
ERROR_UNKNOWN_SERVICE_TYPE	796	The Service Type RADIUS attribute for this user is neither Framed nor Callback Framed.
ERROR_CONNECTING_DEVICE_NOT_FOUND	797	A connection to the remote computer could not be established because the modem was not found or was busy.
ERROR_NO_EAPTLS_CERTIFICATE	798	A certificate could not be found that can be used with the Extensible Authentication Protocol (EAP).
ERROR_SHARING_HOST_ADDRESS_CONFLICT	799	Internet Connection Sharing (ICS) cannot be enabled due to an IP address conflict on the network. ICS requires the host be configured to use 192.168.0.1 . Ensure that no other client on the network is configured to use 192.168.0.1 . Note: Supported in Windows XP and later versions of Windows. Note: Windows 7 and later: The host must be configured to use 192.168.137.1
ERROR_AUTOMATIC_VPN_FAILED	800	Unable to establish the VPN connection. The VPN server may be unreachable, or security parameters may not be configured properly for this connection. Note: Supported in Windows XP and later versions of Windows.
ERROR_VALIDATING_SERVER_CERT	801	This connection is configured to validate the identity of the access server, but Windows cannot verify the digital certificate sent by the server. Note: Supported in Windows XP and later versions of Windows.
ERROR_READING_SCARD	802	The card supplied was not recognized. Please check that the card is inserted correctly, and fits securely. Note: Supported in Windows XP with SP1 and later versions of Windows.
ERROR_INVALID_PEAP_COOKIE_CONFIG	803	The PEAP configuration stored in the session cookie does not match the current session configuration. Note: Supported in Windows XP with SP1 and later versions of Windows.
ERROR_INVALID_PEAP_COOKIE_USER	804	The PEAP identity stored in the session cookie does not match the current identity. Note: Supported in Windows XP with SP1 and later versions of Windows.
ERROR_INVALID_MSCHAPV2_CONFIG	805	You cannot dial using this connection at login time because it is configured to use the currently-logged-in user's credentials. Note: Supported in Windows XP with SP1 and later versions of Windows.
ERROR_VPN_GRE_BLOCKED	806	A connection between your computer and the VPN server has been started, but the VPN connection cannot be completed. The most common cause for this is that at least one Internet device (for example, a firewall or a router) between your computer and the VPN server is not configured to allow Generic Routing Encapsulation (GRE) protocol packets. Note: Supported in Windows Vista and later versions of Windows.
ERROR_VPN_DISCONNECT	807	The network connection between your computer and the VPN server was interrupted. This can be caused by a problem in the VPN transmission and is commonly the result of internet latency or simply that your VPN server has reached capacity. Try to reconnect to the VPN server. Note: Supported in Windows Vista and later versions of Windows.
ERROR_VPN_REFUSED	808	The network connection between your computer and the VPN server could not be established because the remote server refused the connection. This is typically caused by a mismatch between the server's configuration and your connection settings. Note: Supported in Windows Vista and later versions of Windows.
ERROR_VPN_TIMEOUT	809	The network connection between your computer and the VPN server could not be established because the remote server is not responding. This could be because one of the network devices (for example, firewalls, NAT, routers) between your computer and the remote server is not configured to allow VPN connections. Note: Supported in Windows Vista and later versions of Windows.
ERROR_VPN_BAD_CERT	810	A network connection between your computer and the VPN server was started, but the VPN connection was not completed. This is typically caused by the use of an incorrect or expired certificate for authentication between the client and the server. Note: Supported in Windows Vista and later versions of Windows
ERROR_VPN_BAD_PSK	811	The network connection between your computer and the VPN server could not be established because the remote server is not responding. This is typically caused by a pre-shared key problem between the client and server. A pre-shared key is used to guarantee you are who you say you are in an IP Security (IPSec) communication cycle. Note: Supported in Windows Vista and later versions of Windows.
ERROR_SERVER_POLICY	812	The connection was prevented because of a policy configured on your RAS/VPN server. Specifically, the authentication method used by the server to verify your username and password may not match the authentication method configured in your connection profile. Note: Supported in Windows Vista and later versions of Windows.
ERROR_BROADBAND_ACTIVE	813	You have attempted to establish a second broadband connection while a previous broadband connection is already established using the same device or port. Note: Supported in Windows Vista and later versions of Windows.
ERROR_BROADBAND_NO_NIC	814	The underlying Ethernet connectivity required for the broadband connection was not found. Note: Supported in Windows Vista and later versions of Windows.
ERROR_BROADBAND_TIMEOUT	815	The broadband network connection could not be established on your computer because the remote server is not responding. This could be caused by a value that is not valid for the 'Service Name' field for this connection. Note: Supported in Windows Vista and later versions of Windows.
ERROR_FEATURE_DEPRECATED	816	A feature or setting you have tried to enable is no longer supported by the remote access service. Note: Supported in Windows Vista and later versions of Windows.
ERROR_CANNOT_DELETE	817	Cannot delete a connection while it is connected. Note: Supported in Windows Vista and later versions of Windows.
ERROR_RASQEC_RESOURCE_CREATION_FAILED	818	The Network Access Protection (NAP) enforcement client could not create system resources for remote access connections. Some network services or resources might not be available. Note: Supported in Windows Vista and later versions of Windows.
ERROR_RASQEC_NAPAGENT_NOT_ENABLED	819	The Network Access Protection Agent (NAP Agent) service has been disabled or is not installed on this computer. Some network services or resources might not be available. Note: Supported in Windows Vista and later versions of Windows.
ERROR_RASQEC_NAPAGENT_NOT_CONNECTED	820	The Network Access Protection (NAP) enforcement client failed to register with the Network Access Protection Agent (NAP Agent) service. Some network services or resources might not be available. Note: Supported in Windows Vista and later versions of Windows.
ERROR_RASQEC_CONN_DOESNOTEXIST	821	The Network Access Protection (NAP) enforcement client was unable to process the request because the remote access connection does not exist. Note: Supported in Windows Vista and later versions of Windows.
ERROR_RASQEC_TIMEOUT	822	The Network Access Protection (NAP) enforcement client did not respond. Some network services or resources might not be available. Note: Supported in Windows Vista and later versions of Windows.
ERROR_PEAP_CRYPTOBINDING_INVALID	823	The Crypto-Binding type-length-value (TLV) received is not valid. Note: Supported in Windows Vista and later versions of Windows.
ERROR_PEAP_CRYPTOBINDING_NOTRECEIVED	824	Crypto-Binding TLV was not received. Note: Supported in Windows Vista and later versions of Windows.
ERROR_INVALID_VPNSTRATEGY	825	Point-to-Point Tunneling Protocol (PPTP) is incompatible with IPv6. Change the type of virtual private network to Layer Two Tunneling Protocol (L2TP). Note: Supported in Windows Vista and later versions of Windows.
ERROR_EAPTLS_CACHE_CREDENTIALS_INVALID	826	EAPTLS validation of the cached credentials failed. Discard cached credentials. Note: Supported in Windows Vista and later versions of Windows.
ERROR_IPSEC_SERVICE_STOPPED	827	The L2TP/IPsec connection cannot be completed because the IKE and AuthIP IPSec Keying Modules service and/or the Base Filtering Engine service is not running. These services are required to establish an L2TP/IPSec connection. Note: Supported in Windows Vista and later versions of Windows.
ERROR_IDLE_TIMEOUT	828	The connection was terminated because of idle timeout. Note: Supported in Windows Vista and later versions of Windows.
ERROR_LINK_FAILURE	829	The modem (or other connecting device) was disconnected due to link failure. Note: Supported in Windows Vista and later versions of Windows.
ERROR_USER_LOGOFF	830	The connection was terminated because user logged off. Note: Supported in Windows Vista and later versions of Windows.
ERROR_FAST_USER_SWITCH	831	The connection was terminated because user switch happened. Note: Supported in Windows Vista and later versions of Windows.
ERROR_HIBERNATION	832	The connection was terminated because of hibernation. Note: Supported in Windows Vista and later versions of Windows.
ERROR_SYSTEM_SUSPENDED	833	The connection was terminated because the system got suspended. Note: Supported in Windows Vista and later versions of Windows.
ERROR_RASMAN_SERVICE_STOPPED	834	The connection was terminated because Remote Access Connection manager stopped. Note: Supported in Windows Vista and later versions of Windows.
ERROR_INVALID_SERVER_CERT	835	The L2TP connection attempt failed because the security layer could not authenticate the remote computer. This could be because one or more fields of the certificate presented by the remote server could not be validated as belonging to the target destination. Note: Supported in Windows Vista and later versions of Windows.
ERROR_NOT_NAP_CAPABLE	836	The machine is not NAP capable. Note: Supported in Windows Vista and later versions of Windows.
ERROR_INVALID_TUNNELID	837	Invalid Tunnel ID. Note: Supported in Windows 7 and later versions of Windows.
ERROR_UPDATECONNECTION_REQUEST_IN_PROCESS	838	Another update connection request is in progress. RAS allows only one update connection request at a time. Note: Supported in Windows 7 and later versions of Windows.
ERROR_PROTOCOL_ENGINE_DISABLED	839	Negotiating using configured protocol is disable. Edit connection properties and select different protocol for negotiation and try again. Note: Supported in Windows 7 and later versions of Windows.
ERROR_INTERNAL_ADDRESS_FAILURE	840	Internal address negotiation failed. Note: Supported in Windows 7 and later versions of Windows.
ERROR_FAILED_CP_REQUIRED	841	Client has to request an Internal IPv4 or IPv6 address. Note: Supported in Windows 7 and later versions of Windows.
ERROR_TS_UNACCEPTABLE	842	Traffic Selectors negotiation failed. Note: Supported in Windows 7 and later versions of Windows.
ERROR_MOBIKE_DISABLED	843	Mobility is disabled for this connection. Note: Supported in Windows 7 and later versions of Windows.
ERROR_CANNOT_INITIATE_MOBIKE_UPDATE	844	The VPN Connection is still connecting or re-authenticating because of Quarantine state change. Initiate mobile update only when connection state is 'Connected'. Note: Supported in Windows 7 and later versions of Windows.
ERROR_PEAP_SERVER_REJECTED_CLIENT_TLV	845	Server rejected client authentication, due to unexpected TLV or value mismatch for a TLV. Note: Supported in Windows 7 and later versions of Windows.
ERROR_INVALID_PREFERENCES	846	Either VPN destination preference is not selected by the user or it is no longer valid. Note: Supported in Windows 7 and later versions of Windows.
ERROR_EAPTLS_SCARD_CACHE_CREDENTIALS_INVALID	847	Cached smart card credential is invalid. Note: Supported in Windows 7 and later versions of Windows.
ERROR_SSTP_COOKIE_SET_FAILURE	848	VPN connection attempt failed due to internal error occurred while adding cookies to the Secure Socket Tunneling Protocol (SSTP). Please see the System Event Log for the detailed information.
ERROR_INVALID_PEAP_COOKIE_ATTRIBUTES	849	The PEAP inner method attribute(s) stored in the cookie is/are invalid.
ERROR_EAP_METHOD_NOT_INSTALLED	850	The Extensible Authentication Protocol type required for authentication of the remote access connection is not installed on your computer.
ERROR_EAP_METHOD_DOES_NOT_SUPPORT_SSO	851	The Extensible Authentication Protocol type configured on the remote access connection does not support single sign-on.
ERROR_EAP_METHOD_OPERATION_NOT_SUPPORTED	852	The Extensible Authentication Protocol type configured on the remote access connection does not support the requested operation.
ERROR_EAP_USER_CERT_INVALID	853	The remote access connection completed, but authentication failed because the certificate that authenticates the client to the server is not valid. Ensure that the certificate used for authentication is valid.
ERROR_EAP_USER_CERT_EXPIRED	854	The remote access connection completed, but authentication failed because the certificate that authenticates the client to the server is expired. Renew the certificate.
ERROR_EAP_USER_CERT_REVOKED	855	The remote access connection completed, but authentication failed because the certificate that authenticates the client to the server is revoked. Use a certificate that has not been revoked.
ERROR_EAP_USER_CERT_OTHER_ERROR	856	The remote access connection completed, but authentication failed because of an error in the certificate that authenticates the client to the server.
ERROR_EAP_SERVER_CERT_INVALID	857	The remote access connection completed, but authentication failed because the certificate that the client uses to authenticate the server is not valid.
ERROR_EAP_SERVER_CERT_EXPIRED	858	The remote access connection completed, but authentication failed because the certificate that the client uses to authenticate the server is expired.
ERROR_EAP_SERVER_CERT_REVOKED	859	The remote access connection completed, but authentication failed because the certificate that the client uses to authenticate the server is revoked.
ERROR_EAP_SERVER_CERT_OTHER_ERROR	860	The remote access connection completed, but authentication failed because of an error in the certificate that the client uses to authenticate the server.
ERROR_EAP_USER_ROOT_CERT_NOT_FOUND	861	The remote access connection completed, but authentication failed because a trusted root certificate that validates the user certificate was not found in the Trusted Root Certification Authorities certificate store.
ERROR_EAP_USER_ROOT_CERT_INVALID	862	The remote access connection completed, but authentication failed because the trusted root certificate that is used to validate the user certificate is not valid.
ERROR_EAP_USER_ROOT_CERT_EXPIRED	863	The remote access connection completed, but authentication failed because the certificate in the Trusted Root Certification Authorities certificate store that authenticates the user certificate is expired. Renew the certificate.
ERROR_EAP_SERVER_ROOT_CERT_NOT_FOUND	864	The remote access connection completed, but authentication failed because a certificate that validates the server certificate was not found in the Trusted Root Certification Authorities certificate store.
ERROR_EAP_SERVER_ROOT_CERT_INVALID	865	The remote access connection completed, but authentication failed because the certificate in the Trusted Root Certification Authorities certificate store that validates the server certificate is not valid.
ERROR_EAP_SERVER_ROOT_CERT_NAME_REQUIRED	866	The remote access connection completed, but authentication failed because the certificate on the server computer does not have a server name specified.
ERROR_PEAP_IDENTITY_MISMATCH	867	The PEAP outer identity is not same as the inner identity when identity privacy is turned OFF.
ERROR_DNSNAME_NOT_RESOLVABLE	868	The remote connection was not made because the name of the remote access server did not resolve.
ERROR_EAPTLS_PASSWD_INVALID	869	The password provided for the certificate is not valid.
ERROR_IKEV2_PSK_INTERFACE_ALREADY_EXISTS	870	The interface could not be enabled because more than one interface with the same destination has been created with the pre-shared key authentication method. Change the destination/auth method and enable the interface.
ERROR_ROUTER_STOPPED	900	The router is not running.
ERROR_ALREADY_CONNECTED	901	The interface is already connected.
ERROR_UNKNOWN_PROTOCOL_ID	902	The specified protocol identifier is not known to the router.
ERROR_DDM_NOT_RUNNING	903	The Demand-dial Interface Manager (DDM) is not running.
ERROR_INTERFACE_ALREADY_EXISTS	904	An interface with this name is already registered with the router.
ERROR_NO_SUCH_INTERFACE	905	An interface with this name is not registered with the router.
ERROR_INTERFACE_NOT_CONNECTED	906	The interface is not connected.
ERROR_PROTOCOL_STOP_PENDING	907	The specified protocol is stopping.
ERROR_INTERFACE_CONNECTED	908	The interface is connected and hence cannot be deleted.
ERROR_NO_INTERFACE_CREDENTIALS_SET	909	The interface credentials have not been set.
ERROR_ALREADY_CONNECTING	910	This interface is already in the process of connecting.
ERROR_UPDATE_IN_PROGRESS	911	An update of routing information on this interface is already in progress.
ERROR_INTERFACE_CONFIGURATION	912	The interface configration is not valid. There is already another interface that is connected to the same interface on the remote router.
ERROR_NOT_CLIENT_PORT	913	A Remote Access Client attempted to connect over a port that was reserved for routers only.
ERROR_NOT_ROUTER_PORT	914	A Demand Dial Router attempted to connect over a port that was reserved for Remote Access Clients only.
ERROR_CLIENT_INTERFACE_ALREADY_EXISTS	915	The client interface with this name already exists and is currently connected.
ERROR_INTERFACE_DISABLED	916	The interface is in a disabled state.
ERROR_AUTH_PROTOCOL_REJECTED	917	The authentication protocol was rejected by the remote peer.
ERROR_NO_AUTH_PROTOCOL_AVAILABLE	918	There are no authentication protocols available for use.
ERROR_PEER_REFUSED_AUTH	919	The connection could not be established because the authentication protocol used by the RAS/VPN server to verify your username and password could not be matched with the settings in your connection profile.
ERROR_REMOTE_NO_DIALIN_PERMISSION	920	The remote account does not have Remote Access permission.
ERROR_REMOTE_PASSWD_EXPIRED	921	The remote account has expired.
ERROR_REMOTE_ACCT_DISABLED	922	The remote account is disabled.
ERROR_REMOTE_RESTRICTED_LOGON_HOURS	923	The remote account is not permitted to logon at this time of day.
ERROR_REMOTE_AUTHENTICATION_FAILURE	924	Access was denied to the remote peer because the user name, password, or both is not valid on the domain.
ERROR_INTERFACE_HAS_NO_DEVICES	925	There are no routing enabled ports available for use by this demand dial interface.
ERROR_IDLE_DISCONNECTED	926	The port has been disconnected due to inactivity.
ERROR_INTERFACE_UNREACHABLE	927	The interface is not reachable at this time.
ERROR_SERVICE_IS_PAUSED	928	The Demand Dial service is in a paused state.
ERROR_INTERFACE_DISCONNECTED	929	The interface has been disconnected by the administrator.
ERROR_AUTH_SERVER_TIMEOUT	930	The authentication server did not respond to authentication requests in a timely fashion.
ERROR_PORT_LIMIT_REACHED	931	The maximum number of ports allowed for use in the multi-linked connection has been reached.
ERROR_PPP_SESSION_TIMEOUT	932	The connection time limit for the user has been reached.
ERROR_MAX_LAN_INTERFACE_LIMIT	933	The maximum limit on the number of LAN interfaces supported has been reached.
ERROR_MAX_WAN_INTERFACE_LIMIT	934	The maximum limit on the number of Demand Dial interfaces supported has been reached.
ERROR_MAX_CLIENT_INTERFACE_LIMIT	935	The maximum limit on the number of Remote Access Clients supported has been reached.
ERROR_BAP_DISCONNECTED	936	The port has been disconnected due to the Bandwidth Allocation Protocol (BAP) policy.
ERROR_USER_LIMIT	937	Because another connection of your type is in use, the incoming connection cannot accept your connection request.
ERROR_NO_RADIUS_SERVERS	938	No RADIUS servers were located on the network.
ERROR_INVALID_RADIUS_RESPONSE	939	The response received from the RADIUS authentication server was not valid. Make sure that the case sensitive secret password for the RADIUS server is set correctly.
ERROR_DIALIN_HOURS_RESTRICTION	940	You do not have permission to connect at this time.
ERROR_ALLOWED_PORT_TYPE_RESTRICTION	941	You do not have permission to connect using the current device type.
ERROR_AUTH_PROTOCOL_RESTRICTION	942	The connection could not be established because the authentication method used by your connection profile is not permitted for use by an access policy configured on the RAS/VPN server. Specifically, this could be due to configuration differences between the authentication method selected on the RAS/VPN server and the access policy configured for it.
ERROR_BAP_REQUIRED	943	BAP is required for this user.
ERROR_DIALOUT_HOURS_RESTRICTION	944	The interface is not allowed to connect at this time.
ERROR_ROUTER_CONFIG_INCOMPATIBLE	945	The saved router configuration is incompatible with the current router.
WARNING_NO_MD5_MIGRATION	946	Remote Access has detected older format user accounts that will not be migrated automatically.
ERROR_PROTOCOL_ALREADY_INSTALLED	948	The transport is already installed with the router.
ERROR_INVALID_SIGNATURE_LENGTH	949	The signature length received in a packet from RADIUS server is not valid. Note: Supported in Windows XP and later versions of Windows.
ERROR_INVALID_SIGNATURE	950	The signature received in a packet from RADIUS server is not valid. Note: Supported in Windows XP and later versions of Windows.
ERROR_NO_SIGNATURE	951	Did not receive signature along with EAPMessage from RADIUS server. Note: Supported in Windows XP and later versions of Windows.
ERROR_INVALID_PACKET_LENGTH_OR_ID	952	The length or Id received in a packet from RADIUS server is not valid. Note: Supported in Windows XP and later versions of Windows.
ERROR_INVALID_ATTRIBUTE_LENGTH	953	The length received in a packet with attribute from RADIUS server is not valid. Note: Supported in Windows XP and later versions of Windows.
ERROR_INVALID_PACKET	954	The packet received from RADIUS server in not valid. Note: Supported in Windows XP and later versions of Windows.
ERROR_AUTHENTICATOR_MISMATCH	955	Authenticator does not match in packet from RADIUS server. Note: Supported in Windows XP and later versions of Windows.
ERROR_REMOTEACCESS_NOT_CONFIGURED	956	Routing and Remote access server is either not configured or not running. Note: Supported in Windows 7 and later versions of Windows.
326 entries

Article text from the Win32 documentation (opens in a new tab), by Microsoft, under the CC BY 4.0 (opens in a new tab) licence.