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Microsoft KB Archive/107382

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Knowledge Base

Article ID: 107382

Article Last Modified on 12/5/2003


  • Microsoft SNA Server 2.0, when used with:
    • Microsoft Windows NT 4.0
  • Microsoft SNA Server 2.1, when used with:
    • Microsoft Windows NT 4.0
  • Microsoft SNA Server 3.0, when used with:
    • Microsoft Windows NT 4.0

This article was previously published under Q107382


An application exception occurs in SNA Server and a Dr. Watson log is generated. The log shows that exception C0000005 has occurred in module SNASERVR. This only happens when the Attachmate Extra print emulator communicates with SNA Server.


This error is observed when the Attachmate Extra print emulator sends an Open(PLU) response to the SNA Server over it's SSCP-LU connection, rather than the PLU-SLU connection. The OPEN(PLU) response uses the FMI interface which is a trusted interface. Because this is a trusted interface SNA Server does not verify that the destination value is correct. When the PLU session attempts to process the incorrect response, the exception occurs.


Microsoft has updated the SNA Server 2.11 file, SNASERVR.EXE, to validate the destination of the Open(PLU) response, rather than simply attempting to process the message.


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):


Additional query words: prodsna

Keywords: kbbug kbnetwork KB107382