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Excel fails when Automation add-In loads
Article ID: 284876 - View products that this article applies to.
This article was previously published under Q284876
When Microsoft Excel loads an Automation add-in during cell edit mode, Excel fails. This problem only occurs with Automation add-ins that have been Demand Loaded into Excel.
This problem can occur when an add-in loads if the add-in displays a form or dialog box, or if the add-in makes an Automation request to Excel that tries to change the state of Excel. The following list includes samples of Automation requests that may cause Excel to fail when it is called while an Automation add-in loads during cell edit mode:
Do not try the above-mentioned actions while your add-in loads. Add-in methods that are called during the load include the Initialize method and, if your Automation add-in implements the IDTExtensibility2 interface, the OnConnection and OnStartupComplete methods as well.
Microsoft has confirmed that this is a bug in the Microsoft products that are listed at the beginning of this article.
Steps to Reproduce Problem
For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/291392/ )INFO: Excel COM Add-ins and Automation Add-ins