This article lists the error codes that you may receive when you use Windows 2000, Windows XP, or Windows Server 2003 as a client computer to make a dial-up connection or a VPN connection.
Note Error codes with numbers higher than 900 will only be seen if you are trying to connect to a Routing and Remote Access Server that is running Windows 2000 or later.
The following list contains the error codes for dial-up connections or VPN connections:
600 An operation is pending.
601 The port handle is invalid.
602 The port is already open.
603 Caller's buffer is too small.
604 Wrong information specified.
605 Cannot set port information.
606 The port is not connected.
607 The event is invalid.
608 The device does not exist.
609 The device type does not exist.
610 The buffer is invalid.
611 The route is not available.
612 The route is not allocated.
613 Invalid compression specified.
614 Out of buffers.
615 The port was not found.
616 An asynchronous request is pending.
617 The port or device is already disconnecting.
618 The port is not open.
619 The port is disconnected.
620 There are no endpoints.
621 Cannot open the phone book file.
622 Cannot load the phone book file.
623 Cannot find the phone book entry.
624 Cannot write the phone book file.
625 Invalid information found in the phone book.
626 Cannot load a string.
627 Cannot find key.
628 The port was disconnected.
629 The port was disconnected by the remote machine.
630 The port was disconnected due to hardware failure.
631 The port was disconnected by the user.
632 The structure size is incorrect.
633 The port is already in use or is not configured for Remote Access dialout.
634 Cannot register your computer on the remote network.
635 Unknown error.
636 The wrong device is attached to the port.
637 The string could not be converted.
638 The request has timed out.
639 No asynchronous net available.
640 A NetBIOS error has occurred.
641 The server cannot allocate NetBIOS resources needed to support the client.
642 One of your NetBIOS names is already registered on the remote network.
643 A network adapter at the server failed.
644 You will not receive network message popups.
645 Internal authentication error.
646 The account is not permitted to log on at this time of day.
647 The account is disabled.
648 The password has expired.
649 The account does not have Remote Access permission.
650 The Remote Access server is not responding.
651 Your modem (or other connecting device) has reported an error.
652 Unrecognized response from the device.
653 A macro required by the device was not found in the device .INF file section.
654 A command or response in the device .INF file section refers to an undefined macro
655 The <message> macro was not found in the device .INF file section.
656 The <defaultoff> macro in the device .INF file section contains an undefined macro
657 The device .INF file could not be opened.
658 The device name in the device .INF or media .INI file is too long.
659 The media .INI file refers to an unknown device name.
660 The device .INF file contains no responses for the command.
661 The device .INF file is missing a command.
662 Attempted to set a macro not listed in device .INF file section.
663 The media .INI file refers to an unknown device type.
664 Cannot allocate memory.
665 The port is not configured for Remote Access.
666 Your modem (or other connecting device) is not functioning.
667 Cannot read the media .INI file.
668 The connection dropped.
669 The usage parameter in the media .INI file is invalid.
670 Cannot read the section name from the media .INI file.
671 Cannot read the device type from the media .INI file.
672 Cannot read the device name from the media .INI file.
673 Cannot read the usage from the media .INI file.
674 Cannot read the maximum connection BPS rate from the media .INI file.
675 Cannot read the maximum carrier BPS rate from the media .INI file.
676 The line is busy.
677 A person answered instead of a modem.
678 There is no answer.
679 Cannot detect carrier.
680 There is no dial tone.
681 General error reported by device.
682 ERROR WRITING SECTIONNAME
683 ERROR WRITING DEVICETYPE
684 ERROR WRITING DEVICENAME
685 ERROR WRITING MAXCONNECTBPS
686 ERROR WRITING MAXCARRIERBPS
687 ERROR WRITING USAGE
688 ERROR WRITING DEFAULTOFF
689 ERROR READING DEFAULTOFF
690 ERROR EMPTY INI FILE
691 Access denied because username and/or password is invalid on the domain.
692 Hardware failure in port or attached device.
693 ERROR NOT BINARY MACRO
694 ERROR DCB NOT FOUND
695 ERROR STATE MACHINES NOT STARTED
696 ERROR STATE MACHINES ALREADY STARTED
697 ERROR PARTIAL RESPONSE LOOPING
698 A response keyname in the device .INF file is not in the expected format.
699 The device response caused buffer overflow.
700 The expanded command in the device .INF file is too long.
701 The device moved to a BPS rate not supported by the COM driver.
702 Device response received when none expected.
703 ERROR INTERACTIVE MODE
704 ERROR BAD CALLBACK NUMBER
705 ERROR INVALID AUTH STATE
706 ERROR WRITING INITBPS
707 X.25 diagnostic indication.
708 The account has expired.
709 Error changing password on domain.
710 Serial overrun errors were detected while communicating with your modem.
711 RasMan initialization failure. Check the event log.
712 Biplex port is initializing. Wait a few seconds and redial.
713 No active ISDN lines are available.
714 Not enough ISDN channels are available to make the call.
715 Too many errors occurred because of poor phone line quality.
716 The Remote Access IP configuration is unusable.
717 No IP addresses are available in the static pool of Remote Access IP addresses.
718 PPP timeout.
719 PPP terminated by remote machine.
720 No PPP control protocols configured.
721 Remote PPP peer is not responding.
722 The PPP packet is invalid.
723 The phone number, including prefix and suffix, is too long.
724 The IPX protocol cannot dial-out on the port because the computer is an IPX router.
725 The IPX protocol cannot dial-in on the port because the IPX router is not installed.
726 The IPX protocol cannot be used for dial-out on more than one port at a time.
727 Cannot access TCPCFG.DLL.
728 Cannot find an IP adapter bound to Remote Access.
729 SLIP cannot be used unless the IP protocol is installed. 730 Computer registration is not complete.
731 The protocol is not configured.
732 The PPP negotiation is not converging.
733 The PPP control protocol for this network protocol is not available on the server.
734 The PPP link control protocol terminated..
735 The requested address was rejected by the server..
736 The remote computer terminated the control protocol.
737 Loopback detected..
738 The server did not assign an address.
739 The remote server cannot use the Windows NT encrypted password.
740 The TAPI devices configured for Remote Access failed to initialize or were not installed correctly.
741 The local computer does not support encryption.
742 The remote server does not support encryption.
743 The remote server requires encryption.
744 Cannot use the IPX net number assigned by the remote server. Check the event log.
751 The callback number contains an invalid character. Only the following 18 characters are allowed: 0 to 9, T, P, W, (, ), -, @, and space
752 A syntax error was encountered while processing a script.
753 The connection could not be disconnected because it was created by the multi-protocol router.
754 The system could not find the multi-link bundle.
755 The system cannot perform automated dial because this connection has a custom dialer specified.
756 This connection is already being dialed.
757 Remote Access Services could not be started automatically. Additional information is provided in the event log.
758 Internet Connection Sharing is already enabled on the connection.
759 An error occurred while the existing Internet Connection Sharing settings were being changed.
760 An error occurred while routing capabilities were being enabled.
761 An error occurred while Internet Connection Sharing was being enabled for the connection.
762 An error occurred while the local network was being configured for sharing.
763 Internet Connection Sharing cannot be enabled. There is more than one LAN connection other than the connection to be shared.
764 No smart card reader is installed.
765 Internet Connection Sharing cannot be enabled. A LAN connection is already configured with the IP address that is required for automatic IP addressing.
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.
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.
768 The connection attempt failed because of failure to encrypt data.
769 The specified destination is not reachable.
770 The remote computer rejected the connection attempt.
771 The connection attempt failed because the network is busy.
772 The remote computer's network hardware is incompatible with the type of call requested.
773 The connection attempt failed because the destination number has changed.
774 The connection attempt failed because of a temporary failure. Try connecting again.
775 The call was blocked by the remote computer.
776 The call could not be connected because the remote computer has invoked the Do Not Disturb feature.
777 The connection attempt failed because the modem (or other connecting device on the remote computer is out of order.
778 It was not possible to verify the identity of the server.
779 To dial out using this connection you must use a smart card.
780 An attempted function is not valid for this connection.
781 The connection requires a certificate, and no valid certificate was found. For further assistance, click More Info or search Help and Support Center for this error number.
782 Internet Connection Sharing (ICS and Internet Connection Firewall (ICF cannot be enabled because Routing and Remote Access has been enabled on this computer. To enable ICS or ICF, first disable Routing and Remote Access. For more information about Routing and Remote Access, ICS, or ICF, see Help and Support.
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.
784 You cannot dial using this connection at logon time, because it is configured to use a user name different than the one on the smart card. If you want to use it at logon time, you must configure it to use the user name on the smart card.
785 You cannot dial using this connection at logon time, because it is not configured to use a smart card. If you want to use it at logon time, you must edit the properties of this connection so that it uses a smart card.
786 The L2TP connection attempt failed because there is no valid machine certificate on your computer for security authentication.
787 The L2TP connection attempt failed because the security layer could not authenticate the remote computer.
788 The L2TP connection attempt failed because the security layer could not negotiate compatible parameters with the remote computer.
789 The L2TP connection attempt failed because the security layer encountered a processing error during initial negotiations with the remote computer.
790 The L2TP connection attempt failed because certificate validation on the remote computer failed.
791 The L2TP connection attempt failed because security policy for the connection was not found.
792 The L2TP connection attempt failed because security negotiation timed out.
793 The L2TP connection attempt failed because an error occurred while negotiating security.
794 The Framed Protocol RADIUS attribute for this user is not PPP.
795 The Tunnel Type RADIUS attribute for this user is not correct.
796 The Service Type RADIUS attribute for this user is neither Framed nor Callback Framed.
797 A connection to the remote computer could not be established because the modem was not found or was busy. For further assistance, click More Info or search Help and Support Center for this error number.
798 A certificate could not be found that can be used with this Extensible Authentication Protocol.
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. Please ensure that no other client on the network is configured to use 192.168.0.1.
800 Unable to establish the VPN connection. The VPN server may be unreachable, or security parameters may not be configured properly for this connection.
801 This connection is configured to validate the identity of the access server, but Windows cannot verify the digital certificate sent by the server.
802 The card supplied was not recognized. Please check that the card is inserted correctly, and fits tightly.
803 The PEAP configuration stored in the session cookie does not match the current session configuration.
804 The PEAP identity stored in the session cookie does not match the current identity.
805 You cannot dial using this connection at logon time, because it is configured to use logged on user's credentials.
900 The router is not running.
901 The interface is already connected.
902 The specified protocol identifier is not known to the router.
903 The Demand-dial Interface Manager is not running.
904 An interface with this name is already registered with the router.
905 An interface with this name is not registered with the router.
906 The interface is not connected.
907 The specified protocol is stopping.
908 The interface is connected and hence cannot be deleted.
909 The interface credentials have not been set.
910 This interface is already in the process of connecting.
911 An update of routing information on this interface is already in progress.
912 The interface configuration in invalid. There is already another interface that is connected to the same interface on the remote router.
913 A Remote Access Client attempted to connect over a port that was reserved for Routers only.
914 A Demand Dial Router attempted to connect over a port that was reserved for Remote Access Clients only.
915 The client interface with this name already exists and is currently connected.
916 The interface is in a disabled state.
917 The authentication protocol was rejected by the remote peer.
918 There are no authentication protocols available for use.
919 The remote computer refused to be authenticated using the configured authentication protocol. The line has been disconnected.
920 The remote account does not have Remote Access permission.
921 The remote account has expired.
922 The remote account is disabled.
923 The remote account is not permitted to logon at this time of day.
924 Access was denied to the remote peer because username and/or password is invalid on the domain.
925 There are no routing enabled ports available for use by this demand dial interface.
926 The port has been disconnected due to inactivity.
927 The interface is not reachable at this time.
928 The Demand Dial service is in a paused state.
929 The interface has been disconnected by the administrator.
930 The authentication server did not respond to authentication requests in a timely fashion.
931 The maximum number of ports allowed for use in the multilinked connection has been reached.
932 The connection time limit for the user has been reached.
933 The maximum limit on the number of LAN interfaces supported has been reached.
934 The maximum limit on the number of Demand Dial interfaces supported has been reached.
935 The maximum limit on the number of Remote Access clients supported has been reached.
936 The port has been disconnected due to the BAP policy.
937 Because another connection of your type is in use, the incoming connection cannot accept your connection request.
938 No RADIUS servers were located on the network.
939 An invalid response was received from the RADIUS authentication server. Make sure that the case sensitive secret password for the RADIUS server is set correctly.
940 You do not have permission to connect at this time.
941 You do not have permission to connect using the current device type.
942 You do not have permission to connect using the selected authentication protocol.
943 BAP is required for this user.
944 The interface is not allowed to connect at this time.
945 The saved router configuration is incompatible with the current router.
946 RemoteAccess has detected older format user accounts that will not be migrated automatically. To migrate these manually, run XXXX.
948 The transport is already installed with the router.
949 Received invalid signature length in packet from RADIUS server.
950 Received invalid signature in packet from RADIUS server.
951 Did not receive signature along with EAPMessage from RADIUS server.
952 Received packet with invalid length or Id from RADIUS server.
953 Received packet with attribute with invalid length from RADIUS server.
954 Received invalid packet from RADIUS server.
955 Authenticator does not match in packet from RADIUS server.
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