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New Member

Perflib Error in Event Viewer

I am installing Unity 3.1x on a ICS7750 after Exchange is installed I am getting errors in the Event Viewer listed below. I searched CCO, here, and MS Support and cannot find details, any ideas???? I have installed once with this error, rebuilt the server followed the instructions completely and still received this error?<br><br><br>EVENT: <br>Source: Perflib<br>Event ID: 1008<br>Type: Error<br>Description: The Open Procedure for service "ISAPISearch" in DLL "C:\<computername>\System32\query.dll" failed. Performance data for this service will not be available. Status code returned is data DWORD 0.<br><br><br>

New Member

Re: Perflib Error in Event Viewer

How to stop Performance Monitor Errors in the Event Log

Without going into a huge discussion of the inner workings or limitations of Performance Monitor, this is actually expected. The errors are created when a windows components loads improperly or has erroneous information in the registry in its hook to Performance Monitor.

The errors can be quelled by either removing the Open value from HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\:\Performance (your service may vary)


by changing the more global setting ExtCounterTestLevel down to something like 3 in the registry. (see Q226494, it also has a good explanation of the errors.)

If setting the test level for the performance counters still produces errors, setting the EventLogLevel registry value to 0 will stop all errors from being reported. This is not entirely recommended, but setting it to 1 or higher should reduce the amount of errors in most cases.

Anyhow, for more information, i will refer your attention to the following Microsoft Knowledge Base articles:

INFO: Events for Performance Monitor Extensions (Q226494);en-us;Q226494

Troubleshooting Performance Monitor Counter Problems (Q152513);en-us;Q152513

Performance Monitor Counters Cause Stop or Error Messages (Q173060);en-us;Q173060

HOWTO: Fully Uninstall a Performance Monitor Extension (Q247226);en-us;Q247226

Hope this helps,

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