Unable to cast COM object of type ‘System.__ComObject’ to interface type ‘Microsoft.SqlServer.Dts.Runtime.Wrapper.IDTSVariables100’.

This shows you how to resolve the error “Unable to cast COM object of type ‘System.__ComObject’ to interface type ‘Microsoft.SqlServer.Dts.Runtime.Wrapper.IDTSVariables100’.” in SSIS. This message actually does not make any sense to anyone.

I was looping through my Excel Worksheet in SSIS and I got the following message.

Unable to cast COM object of type ‘System.__ComObject’ to interface type ‘Microsoft.SqlServer.Dts.Runtime.Wrapper.IDTSVariables100’. This operation failed because the QueryInterface call on the COM component for the interface with IID ‘{D1A469BC-F371-4D15-832F-BACB50C162E9}’ failed due to the following error: The application called an interface that was marshalled for a different thread. (Exception from HRESULT: 0x8001010E (RPC_E_WRONG_THREAD)).

Again, the message did not make any sense to anyone. So I tried to set the TargetServerVersion property for SSIS Project. Somehow, it was working fine.

Do not just follow me and set SQL Server 2014. You must know the version of SQL Server that you are using.

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About chanmingman

Since March 2011 Microsoft Live Spaces migrated to Wordpress (http://www.pcworld.com/article/206455/Microsoft_Live_Spaces_Moves_to_WordPress_An_FAQ.html) till now, I have is over 1 million viewers. This blog is about more than 50% telling you how to resolve error messages, especial for Microsoft products. The blog also has a lot of guidance teaching you how to get stated certain Microsoft technologies. The blog also uses as a help to keep my memory. The blog is never meant to give people consulting services or silver bullet solutions. It is a contribution to the community. Thanks for your support over the years. Ming Man is Microsoft MVP since year 2006. He is a software development manager for a multinational company. With 25 years of experience in the IT field, he has developed system using Clipper, COBOL, VB5, VB6, VB.NET, Java and C #. He has been using Visual Studio (.NET) since the Beta back in year 2000. He and the team have developed many projects using .NET platform such as SCM, and HR based applications. He is familiar with the N-Tier design of business application and is also an expert with database experience in MS SQL, Oracle and AS 400.
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