Returns the error codes regarding each connection.

Function Group Execution Windows Embedded Thin Client Mobile Access
DialError Dial-up Synchronous Supported (see note) Supported Supported Not supported


  DialError( numType, strPhonebookEntryOrModem, "optError", optRefresh )  
A numeric flag that specifies the content of the strPhonebookEntryorModem parameter.
  • 0: Phonebook Name
  • 1: Modem Name
  • 2: Direct Connection Name
The Phonebook Name, Modem Name, or Direct Connection Name used to make the connection. The numType parameter specifies which of these methods is used.
Optional The name of the string tag receiving the Error Message.
Note: The tag name should be enclosed in quotes, as shown in the syntax diagram, or else the function will try to use the value of the tag.
Optional tag, which causes the function to update its return value. This parameter is optional but you must use it when configuring this function for an object animation (e.g., Text Data Link, Position).

Returned value

Value Description
0 OK
−1 Error: INDRas.DLL not found.
−2 Error: INDRas.DLL damaged.
−3 Error: invalid number of parameters (minimum=2).
-4 Invalid value for the numType parameter (0 or 1).
-5 PhoneBook or Modem does not exist.
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 file.
626 Cannot load a string.
627 Cannot find key.
628 The port was disconnected.
629 The data link was terminated 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 dial out.
634 Cannot register your computer on 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 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 pop-ups.
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 acro.
655 The <message macro was not found in the device .INF file secion.
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.
691 Access denied because username and/or password is invalid on the domain.
692 Hardware failure in port or attached device.
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 The Application does not allow user interaction the connection requires interaction with the user to complete successfully
707 X.25 diagnostic indication.
708 The account has expired.
709 Error changing password on domain The password may be too short or may match a previously used password.
710 Serial overrun errors were detected while communicating with your modem.
711 RasMan initialization failure Check the event log.
712 Biplex port initializing Wait a few seconds and redial.
713 No active ISDN lines are available.
714 No 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 Timed out waiting for a valid response from the remote PPP peer.
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 machine 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 authentication protocol required by the remote server cannot use the Windows NT encrypted password Redial, entering the password explicitly.
740 Invalid TAPI configuration.
741 The local computer does not support the required encryption type.
742 The remote computer does not support the required encryption type.
743 The remote computer requires encryption.
744 Cannot use the IPX network number assigned by remote server Check the event log.
751 Invalid callback number Only the characters 0 to 9, T, P, W, (, ), -, @, and space are allowed in the number.
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.


This function is not supported on Windows 7.


Tag Name Expression
Tag DialError( 0, “Office DialUp” )
Tag DialError( 1, “USRobotics_SportsterFaxModem”, “StatusMessage”, second )
Tag DialError( 2, “DirectDial”, “DialupError” )

See also: FindModem()