KB918601 - http://support.microsoft.com/?id=918601

 

SYMPTOMS

The Microsoft Operations Manager (MOM) 2005 Service Pack 1 (SP1) Operator console closes unexpectedly. Then, you receive the following error message:
Application has generated an exception that could not be handled.
Additionally, you may receive the following error message:
Could not instantiate ActiveX control '9442f918-34d5-4c63-be91-d8ad5841d646' because the current thread is not in a single-threaded apartment.
Note If you generate a dump file, this information also appears in the generated dump file.
 
 
 
A hotfix is available from Microsoft PSS to correct this issue.