Unable to cast COM object of type 'System.__ComObject' to interface type 'Microsoft.VisualStudio.OLE.Interop.IServiceProvider'

Question

After installing Visual Studio 2008 and SQL Server 2008 on Windows 7, I get the following error when connecting to a server with SQL Management Studio:

Unable to cast COM object of type 'System.__ComObject' to interface type 'Microsoft.VisualStudio.OLE.Interop.IServiceProvider'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{6D5140C1-7436-11CE-8034-00AA006009FA}' failed due to the following error: No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE)). (Microsoft.VisualStudio.OLE.Interop)

I've seen blog postings recommending reregistering actprxy.dll, but this has no effect. Anyone know how to resolve this issue?

Reeher

I'm having a similar error when I try to publish with ClickOnce (no sql-server involved) – Tsimshian

Answer 1

actprxy.dll also didn't work for me. I found a solution that worked here

regsvr32 "C:\Program Files\Internet Explorer\ieproxy.dll"

if you are running 64 bit windows, try this:

regsvr32 "C:\Program Files (x86)\Internet Explorer\ieproxy.dll"

Blackmun

I was running into this issue on the new (as of April 2012) Visual Studio 11 beta. Running this step fixed it for me. Thank you! – Rupee

This solution fix the problem. And for those who don't have just in time debugging enabled, note that this fix some error reported as: microsoft visual studio has stopped working Maybe it will help others lose less time. Frederic – Camboose

I had this error in Visual Studio (although it was not a new install, it came all of a sudden) and the first line fixed it! – Paling

Answer 2

It's triggered when NPMWrapper tries to launch interactive auth. Try

npm logout

then

npm login

this worked for me. Seems to be a bug in the login sequence

Smew