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When you run a stack trace on a computer that is running Microsoft Office Communications Server 2007, you may receive an access violation error message in the APIEM.DLL!WPP_SF_qSS call.
This issue occurs when the stack trace tries to dereference the LomMessageTypeNames[NotificationId]) variable.
How to obtain the hotfix
This issue is fixed in the Office Communications Server 2007 Hotfix Package that was released on November 2, 2007. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
942872 Description of the Communications Server 2007 update package: November 2, 2007
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.