Knowledge Base

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

Article ID: 177805

Article Last Modified on 10/28/2006

Microsoft Outlook 97 Standard Edition, when used with:
- Microsoft Windows NT 4.0
Microsoft Exchange Server 5.5 Standard Edition

This article was previously published under Q177805

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.

Additional query words: ol97

Keywords: kbprb KB177805