An issue can occur when attempting to Monitor 'Custom Data | NT Performance Monitor Data' using the Monitor Data | Data Source Wizard, where the Performance Object list appears disabled in Performance Explorer.



One possible reason for this error is that the version of the file pdh.dll contained in the Windows System folder is newer than the version in the Silk Performer directory.

Windows System folder:

C:\WINNT\system32
or
C:\WINDOWS\system32


Default SilkPerformer directory:

C:\Program Files (x86)\silk\Silk Performer 10.0

To check if this is the cause of the error locate each instance of pdh.dll (as above), right-click on the file, choose "properties", then choose the "Version" tab.  The version of pdh.dll will then be displayed.  If the version of pdh.dll in the System folder is newer than the Silk Performer version then rename pdh.dll in the Silk Performer installation directory (e.g. rename the file to "pdh.old").

Renaming (or deleting) the "pdh.dll" in the Silk Performer folder will cause Performance Explorer to use the system's pdh.dll.