XCON: X.25 Stack Installed But Unusable

ID: Q182975

The information in this article applies to:

Microsoft Exchange Server, version 4.0

IMPORTANT: This article contains information about editing the registry. Before you edit the registry, make sure you understand how to restore it if a problem occurs. For information about how to do this, view the "Restoring the Registry" Help topic in Regedit.exe or the "Restoring a Registry Key" Help topic in Regedt32.exe.

SYMPTOMS

Messages sent over a connector using an X.25 stack are not delivered. Non- delivery reports (NDRs) are returned. On the server, the application event log shows the following:


   Events 9409
   The Microsoft MTA registry parameter is missing.  The default value
   will be used.
   For these parameters:
   Eicon X.25 result threads
   Eicon X.25 connections
   Eicon wait timeout (ms)

-AND-


   Event 9106
   An internal MTA error occurred.  The X.25 interface failed to
   initialize. Check to make sure the X.25 card is started. (14)

RESOLUTION

To resolve this problem, manually add the default keys using the Registry Editor.

WARNING: Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.

For information about how to edit the registry, view the "Changing Keys And Values" Help topic in Registry Editor (Regedit.exe) or the "Add and Delete Information in the Registry" and "Edit Registry Data" Help topics in Regedt32.exe. Note that you should back up the registry before you edit it. If you are running Windows NT, you should also update your Emergency Repair Disk (ERD).

Start Registry Editor (Regedt32.exe), and go to the following subkey:
```
      HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services
      \MSEchangeMTA\Parameters 
```
NOTE: The above registry key is all one path; it has been wrapped for readability.

On the Edit menu, click Add Value, and add the following information:
Eicon ait timeout (MS) as REG_DWORD 0x1F4
Eicon X.25 connections as REG_DWORD 0x14
Eicon X.25 result threads as REG_DWORD 0x2

Quit Registry Editor.

Restart the message transfer agent (MTA).

Additional query words: kbprb kbtshoot X25

Keywords : XCON
Version : WINDOWS:4.0
Platform : winnt
Issue type : kbprb