SNA Windows NT Client Fails on Windows 2000 Terminal Server (247042)


The information in this article applies to:

  • Microsoft SNA Server 2.11
  • Microsoft SNA Server 2.11 SP1
  • Microsoft SNA Server 2.11 SP2
  • Microsoft SNA Server 3.0 SP1
  • Microsoft SNA Server 3.0 SP2
  • Microsoft SNA Server 3.0 SP3
  • Microsoft SNA Server 3.0 SP4
  • Microsoft SNA Server 4.0
  • Microsoft SNA Server 4.0 SP1
  • Microsoft SNA Server 4.0 SP2
This article was previously published under Q247042

SYMPTOMS

When the SNA Server client for Windows NT is installed on a computer running Windows 2000 Terminal Server, the SnaBase Service fails to start. For example, if the 3270 applet is started in a Terminal Server session connected to a Windows 2000 Server computer, the following error message occurs:
ERROR - The SnaBase Service is not started.
Other SNA Server client components may simply stop responding. The Windows 95 client does not have any problem running in the same environment.

Note: This problem occurs even after the SNA Windows NT client binaries are registered using the Terminal Services command file that is distributed with SNA Server.

CAUSE

The SNA Server Windows NT client software components share a global-memory mapped file region on the computer, and use named events for the SnaBase service and SNA applications to coordinate operations with each other. However, SNA applications are unable to locate the shared memory segment created by the SnaBase service when they are run under Windows 2000 Terminal Services (WTS). This is because WTS requires that these applications prepend any named memory and named events with a "Global\" name prefix.

RESOLUTION

To resolve this problem, obtain the latest service pack for SNA Server 4.0. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

215838 How to Obtain the Latest SNA Server Version 4.0 Service Pack

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in SNA Server 4.0 Service Pack 3.
Modification Type:MajorLast Reviewed:6/28/2004
Keywords:kbbug kbfix KB247042
©2004 Microsoft Corporation. All rights reserved.