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How to solve a class not found error when using a Microsoft SQL sensor?

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I am trying to setup a probe to monior my SQL database. I am getting the following error:

     Class(es) not found:
         Win32_PerfRawData_MSSQLOPTIONS2008_MSSQLOPTIONS2008GeneralStatistics

I know that the username and password to the SQL database is correct. I have setup probes for other servers before without any issues. I only have this issue when I try to setup a probe to an SQL database. What is the problem and how can it be resolved.

Thanks in advance Greg

probe prtg sql

Created on Oct 4, 2010 6:28:55 PM by  greg-sco (0) 1

Last change on Oct 15, 2010 2:37:40 PM by  Daniel Zobel [Product Manager]



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Please have a look at I have tried a lot of things to fix my WMI. What else can I try to avoid reinstalling Windows?

Particularly the The refresh performance counters option refering to the following commands:

wmiadap /f wmiadap /r

Created on Jan 7, 2011 1:43:57 PM by  Patrick Hutter [Paessler Support] (7,225) 3 3



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Dear Greg,

which exact sensor do you use? Have you tried the SQL-Sensors?

Best Regards.

Created on Oct 5, 2010 9:30:25 AM by  Torsten Lindner [Paessler Support]

Last change on Oct 6, 2010 12:32:25 PM by  Torsten Lindner [Paessler Support]



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Thanks for the response. I chose the Microsoft-SQL sensor because it is a database that runs on Microsoft SQL 2008. I hope that helps.

Created on Oct 5, 2010 8:48:06 PM by  greg-sco (0) 1



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Dear Greg,

this was unfortunately a bug in PRTG. It should be fixed in next weeks release. Please bear with us.

Best Regards.

Created on Oct 6, 2010 12:32:58 PM by  Torsten Lindner [Paessler Support]



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Has this bug been fixed?

Created on Oct 27, 2010 4:21:11 PM by  echoWhiskey (0)



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This bug should be fixed with version 8.1.1 of PRTG.

Created on Oct 27, 2010 4:28:00 PM by  Torsten Lindner [Paessler Support]



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Running PRTG Network Monitor 8.1.2.1810

Tried to setup a SQL Server sensor for our SQL 2008 x64 server and got this message:

Class(es) not found: "Win32_PerfRawData_MSSQLSERVER_SQLServerGeneralStatistics"

Created on Jan 4, 2011 9:43:39 PM by  TimmG6376 (0) 1



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Please have a look at I have tried a lot of things to fix my WMI. What else can I try to avoid reinstalling Windows?

Particularly the The refresh performance counters option refering to the following commands:

wmiadap /f wmiadap /r

Created on Jan 7, 2011 1:43:57 PM by  Patrick Hutter [Paessler Support] (7,225) 3 3



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We had the same issue with three MS SQL 2008 x64 servers and none of the WMI fixes helped. The solution was the installation of Service Pack 2 for SQL Server 2008 (Service Pack 1 didn't fixed it for us).

Created on Oct 18, 2011 10:43:48 AM by  Heiko Meyer (0)



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