Application Exception in Snanmvt.exe

• Microsoft SNA Server, version 4.0

SYMPTOMS

If the SnaNetMn service is configured for automatic startup in Control Panel/Services or if it is started manually, the following popup error message is displayed:

   SNA Server - ERROR # 03...

            OK

In addition, an application exception in Snanmvt.exe occurs that generates a Dr. Watson log in the Windows NT directory. The entry created in the Drwtsn32.log file will be similar to the following:

   Application exception occurred:
           App: exe\snanmvt.dbg (pid=<pid #>)
           When: <date> @ <time>
           Exception number: c0000005 (access violation)

   function: sepdnmsd_int

   [...]
   FAULT ->67241535 803a00           cmp     byte ptr [edx],0x0
   [...]

   Event ID: 4097
   Source: DrWatson
   Description: The application, exe\snanmvt.dbg, generated an application
   error. The error occurred on  <date> @  <time>. The exception generated
   was c0000005 at address 67241535 (sepdnmsd_int)

   Event ID: 624
   Source: SNA Server
   Description: Creating dump file <snaroot>\traces\snadump.log for
   snanmvt.exe

CAUSE

The application exception occurs because a corrupted buffer caused stack corruption while attempting to display popup errors that contained long error messages. The error message that results from starting the SnaNetMn service contains a long description, which is why the application exception occurs.

Note: Other errors may result in an application exception when a popup error message is being displayed. These application exceptions may be reported against components other than Snanmvt.exe.

STATUS

Microsoft has confirmed this to be a problem in SNA Server version 4.0. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

MORE INFORMATION

The SnaNetMn service should not be configured for automatic startup in Control Panel/Services nor started manually by a user. The SNA Server service will start this service if NetView connectivity is configured in the SNA Server configuration.

If the SnaNetMn service is started automatically by Service Control Manager or manually by a user, the following message should be displayed:

SNA Server - ERROR # 0352

Unable to open the configuration file, rc=618

EXPLANATION A Windows NT error occurred while attempting to open the configuration file to obtain configuration information that logged this message.

This error could be due to one of the following: - You have not configured the server using the SNA Server Admin program - The configuration file is corrupt - This is a member server and the primary/backup servers are not available

ACTION Check the Windows NT return code shown on this message. See your Windows NT documentation for information on return codes.

Please refer to the following Knowledge Base article for more information about what SNA Server services can be started automatically through Control Panel/Services:

   Article-ID: Q110390
   Title     : Automatically Starting SNA Server Through Control Panel

Keywords          : prodsna kbbug4.00
Version           : WINDOWS:4.0
Platform          : WINDOWS
Issue type        : kbbug
Solution Type     : kbnofix