Unable to Start Debugging. visual studio 2012 prompt after one time debug

Question

I am getting this error \"Unable to Start Debugging\" in visual studio 2012.

I have also update the remote debugging sp2.

also uninstalled and r

Answer 1

Juste got the same today with VS2010. "Unable to start debugging...a dynamic DLL cannot be found". Also while opening this old project an non-build error in the outpout window: "Unable to find assembly <...>.dll in App_Data\Temp".

Solution: target framework was still at version 3, changed to 4 and then it works.