DMOD Times Out If Client Does Not Quickly Log on to WinNT Domain

ID: Q182526

The information in this article applies to:

Microsoft SNA Server, versions 3.0, 3.0 SP1, 3.0 SP2, 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

Remote Windows 95 clients who dial into the network to gain access to SNA Server (that is, via an IBM 8235) may get an error message saying

SnaBase not started

when using the SNA 3270 or 5250 Applet, as well as third-party emulators. The error only occurs if the user does not log on to the Windows NT domain, when prompted for credentials, before the DMOD times out (default timeout is 60 seconds).

CAUSE

When the 3270 or 5250 application is invoked on the client, SnaBase waits for the connection to SNA Server to activate. The DMOD (Snakrnl.dll) has a timeout value of 60 seconds by default. If SnaBase does not obtain a connection with SNA Server within 60 seconds, the DMOD times out, and the user receives an error message saying SnaBase was not started. The timeout was implemented to keep the application from waiting indefinitely for the connection between SnaBase and SNA Server to activate.

WORKAROUND

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).

To work around this problem, the following registry key can be modified (only on Windows 95 clients) to increase the time the DMOD waits for SnaBase to start:


HKEY_LOCAL_MACHINE\Software\Microsoft\SNABase\Parameters
 Value=StartTimeOut REG_DWORD: (time in seconds)

NOTE: The above registry key is one path; it has been wrapped for readability.

Additional query words:

Keywords : sna5250 sna3270 snaserverservice
Version : WINDOWS:3.0,3.0 SP1,3.0 SP2,4.0
Platform : WINDOWS
Issue type : kbprb