SSIS Unable to cast COM object of type ‘System.__ComObject’ to class type ‘System.Data.SqlClient.SqlConnection’.

This post giving one of the possible solution to resolve the error above.

You have a Script Task in SSIS and utilizing the Connection Manager. The Connection Manager Provider type is Native OLE DB\SQL Server Native Client 11.0.

You have code inside the Script Task.

ConnectionManager cm;

cm = Dts.Connections[“LocalHost.uCustoms”];

SqlConnection sqlConn;

sqlConn = (SqlConnection)cm.AcquireConnection(Dts.Transaction);

You get the error

“System.InvalidCastException was unhandled by user code

HResult=-2147467262

Message=Unable to cast COM object of type ‘System.__ComObject’ to class type ‘System.Data.SqlClient.SqlConnection’. Instances of types that represent COM components cannot be cast to types that do not represent COM components; however they can be cast to interfaces as long as the underlying COM component supports QueryInterface calls for the IID of the interface.

Source=ST_28dc48d9f81b48c88c82e0c815d09082″

You need to change your Connection Manager to .NET Provider\SqlClient Data Provider.

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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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