Microsoft KB Archive/291166

= OL2002: All COM Add-in Run-Time Errors Must Be Trapped =

Article ID: 291166

Article Last Modified on 3/1/2004

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APPLIES TO


 * Microsoft Outlook 2002 Standard Edition

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This article was previously published under Q291166





SYMPTOMS
You create an Outlook COM Add-in and when using it, Outlook stops responding (hangs).



CAUSE
The COM Add-in generated an untrapped run-time error.



RESOLUTION
You must use error trapping to prevent all potential run-time errors from happening.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.



MORE INFORMATION
There are various scenarios where Outlook may hang if you create a COM Add-in and the code in the add-in generates an unexpected run-time error. This problem is related to how Office programs interface with the Visual Basic run-time, and is therefore a general limitation of the COM Add-in architecture.

To avoid these scenarios, every line of code within your COM Add-in must use error trapping to prevent any potential run-time errors from occurring.

