Hello,

that might be a problem on the target hosts WMI, please see if you can fix it with any of the tips from our "WMI Repair"-article: WMI Repair List

best regards.

Thanks, I have already checked that list but this issue is not related to a WMI problem as many other sensors that are using WMI on the same box are working just fine.

I am only seeing this error with the SQL sensors on this one box.

It still possible that only the WMI Classes for the SQL-Server are missing or not correctly set up, which the error-message kind of suggests "Class(es) not found: "

I am having the exact same issue. Is there is a quick fix to get the WMI classes for SQL working? I know the proper services are running and I tried to execute the following command within the SQL server:

mofcomp "c:\Program Files (x86)\Microsoft SQL Server\90\Shared\sqlmgmproviderxpsp2up.mof"

Microsoft (R) MOF Compiler Version 6.0.6000.16386 Copyright (c) Microsoft Corp. 1997-2006. All rights reserved. Parsing MOF file: c:\Program Files (x86)\Microsoft SQL Server\90\Shared\sqlmgmpr oviderxpsp2up.mof MOF file has been successfully parsed Storing data in the repository...

Need help, very annoying.

Thanks! Done!

Same issue here. SQL WMI counters working fine from PRTG Probe Server using PerfMon under the same credentials, but throws this error when used within PRTG.

Any suggestions?

Same problem here! Cannot monitor my SQL Database!

Our research shows some inconsistencies of how Microsoft is naming the classes depending on SQL Server Edition, Windows Version, Instancing. We're still investigating this matter.

However, if you want to help us in this case, please use Microsofts WBEMTest tool and try to find the classes concerning the MSSQLserver you want to monitor.

If successful please send your findings including a short description of your SQL Server System (SQL Server Edition, Windows Version, Instancing, Service Pack Levels etc.) to support@paessler.com - we appreciate any input.

Kind regards,

- Volker