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 macro was not found in the device .INF file section.
656 : The 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.
745 : An Essential File Is Missing
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.
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.
797 : The connection failed because the modem or other connecting device failed. Please make sure that the modem or other connecting device is installed.
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.
780: An attempted function is not valid for this connection.
782 : Routing and Remote Access has been enabled on this computer.
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.
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.
785: You cannot dial using this connection at logon time, because it is not configured to use 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.
798: A certificate could not be found that can be used with this Extensible Authentication Protocol.
799: IP address conflict on the network.
800 : Unable to establish the VPN connection.
