XCLN: Setup Cannot Register Comcat.dll in the System Registry

Last reviewed: February 17, 1998
Article ID: Q177805

The information in this article applies to:

Microsoft Outlook Windows NT client, version 8.03

SYMPTOMS

When you install the Microsoft Outlook client on a Microsoft Exchange Server computer, you may receive the following error:

   Setup cannot register COMCAT.dll in the system registry
   because an older version is in use. Close all applications
   and try again.

CAUSE

The Microsoft Exchange Event Service that uses the Comcat.dll file may be running. This behavior is by design.

RESOLUTION

Stop the Microsoft Exchange Event service in the Control Panel Services icon before starting or continuing with the Outlook installation.

Keywords          : XCLN
Version           : WinNT:8.03
Platform          : winnt
Issue type        : kbprb
Solution Type     : kbworkaround

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Last reviewed: February 17, 1998
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