NetShow Performance Counters May Not Return Any Data

ID: Q198025

The information in this article applies to:

SYMPTOMS

When you use the Windows NT Performance Data Helper API to retrieve counter information, no data is returned by the NetShow Station Service and NetShow Unicast Service performance counters.

CAUSE

A performance extension is expected to set the NumInstances member of the PERF_OBJECT_TYPE structure to -1 when the concerned performance object does not support multiple instances. The extension for the perf object called NetShow Unicast Service appears to set NumInstances to 0 instead. This causes the Windows NT Performance Data Helper API to assume that the object supports instances, but does not have any current instances. Therefore, no data is returned.

RESOLUTION

A supported fix that corrects this problem is now available from Microsoft, but has not been fully regression tested and should be applied only to systems experiencing this specific problem. If you are not severely affected by this specific problem, Microsoft recommends that you wait for the next Windows NT service pack.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web: 

   http://support.microsoft.com/support/supportnet/default.asp
The English version of this fix should have the following file attributes or later: 

   Date       Time     Size     File name      Platform
   ----------------------------------------------------
   12/16/98   05:53p   19,328   Nscmperf.dll   (x86)
   12/16/98   05:53p   19,328   Nsumperf.dll
NOTE: If you contact Microsoft to obtain this fix, a fee may be charged. This fee is refundable if it is determined that you only require the fix you requested. However, this fee is non-refundable if you request additional technical support, if your no-charge technical support period has expired, or if you are not eligible for standard no-charge technical support.

For more information about eligibility for no-charge technical support, see the following article in the Microsoft Knowledge Base: 

   ARTICLE-ID: Q154871
   TITLE:      Determining If Your Product Is Eligible for No-Charge
               Technical Support

WORKAROUND

Windows NT 4.0 Performance Monitor ignores the fact that NumInstances is 0 and displays the counter data anyway.

STATUS

Microsoft has confirmed this to be a problem in NetShow Theater Server version 3.0.

Additional query words: hotfix hot fix qfe quick fix engineering patch

Keywords          :  
Version           : WINDOWS:3.0
Platform          : WINDOWS
Hardware          : ALPHA x86
Issue type        : kbbug
Solution Type     : kbfix

Last Reviewed: December 30, 1998