Microsoft KB Archive/139507

= SNA Server Twinax Connection to IBM 5494 Traps with 0x00000050 =

Article ID: 139507

Article Last Modified on 10/23/2003

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APPLIES TO


 * Microsoft SNA Server 3.0, when used with:
 * Microsoft Windows NT 4.0

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This article was previously published under Q139507





SYMPTOMS
After you stop an SNA Server that is connected through Twinax to an IBM 5494 or 5394 Controller (that is connected to an AS/400) and then restart the server, the server fails with the following STOP message:

STOP:0x00000050



CAUSE
The SNA Server Twinax driver support is not handling the startup sequence properly when connecting through an IBM 5394 or 5494, which differs slightly from the native startup to an AS/400.

When the SNA Server Twinax link service starts, a Memory Descriptor List (MDL) entry that is passed from User Mode to Kernel Mode is corrupt, hence the bugcheck is called displaying the STOP:0x00000050.



RESOLUTION
When you stop the SNA Server service, reboot the server before restarting the service.

Microsoft has updated the following files to correct this problem:

IBMTDLC.SYS

ANDWTDLC.SYS

SNATDLC.DLL.



STATUS
Microsoft has confirmed this to be a problem in SNA Server for Windows NT. This problem was corrected in the latest SNA Server for Windows NT, 2.11 U.S. Service Pack. For information on obtaining the Service Pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

S E R V P A C K

Additional query words: 2.11 prodsna

Keywords: kbbug kbfix KB139507

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