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Invalid Class Errors

The Invalid Class error is typically thrown when running Event Log Backups and the WMI database repository has corrupted.

Verify the error:

  • Open a command-prompt and type:
  • The Wbemtest application opens.
  • Once loaded, click Connect.
  • From the Namespace text box, type:
    Where HOSTNAME is the name of the remote server throwing the error. If either computer resides on a different domain or within a workgroup, specify administrator credentials that reside on the remote computer or domain.
  • Click Connect.
  • Click Query.
  • Specify the following query:
    Select * from Win32_NTLogEvent Where Logfile ='Application'
    You should receive the Invalid Class error.

Resolution Links:

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