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Error HRESULT E_FAIL has been returned from a call to a COM component

Asked 2010-11-17T23:50:20.340
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In Silverlight 4 app; what does this error mean?:

"Error HRESULT E_FAIL has been returned from a call to a COM component."

It's a very generic error. The VS debugger doesn't point to the exact location of the error when debugging.

visual-studio silverlight silverlight-4.0
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This is a security and permissions issue. Look into the IIS and make sure Integrated Security is ON. Then set Application Protection level to Medium (If it is high then this might be the result). Then check your Web.Config file. Make sure impersonation is off.

This should help.

answered 2011-10-10T12:13:48.520

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