Microsoft KB Archive/255161

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WMI Returns a Generic Event Instead of a Specific Trap

Article ID: 255161

Article Last Modified on 2/25/2007


  • Microsoft Windows 2000 Server
  • Microsoft Windows 2000 Advanced Server
  • Microsoft Windows 2000 Professional Edition

This article was previously published under Q255161


Windows Management Instrumentation (WMI) may return a generic Simple Network Management Protocol (SNMP) event instead of a specific event.


Some SNMP agents may place null values in SNMP variables for a trap, even though the value is out of range as defined for the variable in the SNMP Management Information Base (MIB). For example, the variable may support values from 1 to 255. This is a problem in the agent because it is populating the trap with invalid data. The correct behavior, if one or more properties contain valid data, is to ignore the agent errors and send the specific WMI event. If all of the properties in the trap contain invalid data, a generic event should be sent. Because of a problem in the provider, in some cases (even when some of the data is valid), a generic event is sent instead of the specific WMI event.


A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem. This fix may receive additional testing. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next Windows 2000 service pack that contains this hotfix.

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 about support costs, visit the following Microsoft Web site:

NOTE: In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The typical support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

The English version of this fix should have the following file attributes or later:

   Date      Time     Version       Size    File name   
   02/25/00  3:50:10  1.50.1085.17  496 KB  Snmpincl.dll


Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.

Keywords: kbqfe kbhotfixserver kbbug kbfix KB255161