Symptoms
When you run the SQLDiag utility or the PSSDiag utility to collect Performance Monitor (PerfMon) counters, you may receive the following error message:

Exception creating Perfmon logWhen this problem occurs, an error message that resembles the following message is logged in the ##Sqldiag.log file or in the ##Pssdiag.log file:

2006/07/14 01:36:02.71 PSSDIAG Exception 0xC0000005 caught.
2006/07/14 01:36:02.71 PSSDIAG Creating mini-dump file…
2006/07/14 01:36:02.87 PSSDIAG Mini-dump created
2006/07/14 01:36:02.89 ServerName\* Exception creating Perfmon log.Please see Microsoft Knowledge Base article 906532 for a possible remedyNoteThe previous error message is the version for the PSSDiag utility. In the version for the SQLDiag utility, SQLDIAG appears instead of PSSDIAG.The ##Sqldiag.log file is located in the Sqldiag folder. The Sqldiag folder is located in the same folder as the SQLDiag utility. The SQLDiag utility is located in the following folder:
%ProgramFiles%\Microsoft SQL Server\90\Tools\BinnThe ##Pssdiag.log file is located in the Output folder. The Output folder is located in the same folder as the PSSDiag utility. To obtain the PSSDiag utility, visit the following Microsoft download site:
http://www.microsoft.com/downloads/details.aspx?familyid=5564386a-28c2-4483-8293-76fff67b9eb3(http://www.microsoft.com/downloads/details.aspx?familyid=5564386a-28c2-4483-8293-76fff67b9eb3)In another scenario, the SQLDiag utility or the PSSDiag utility may unexpectedly stop after an error message that resembles the following message is logged:

2006/06/10 05:05:02.20 ServerName\* Starting Perfmon
Resolution
These problems occur because of a problem in the Microsoft Windows Performance Data Helper (PDH) library and in the performance extension DLL. Both the SQLDiag utility and the PSSDiag utility use the PDH library to collect Performance Monitor counters. The Performance Monitor counters are provided by the performance extension DLL. This DLL is available through the PDH library.