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visual-studio-2012visual-studio-debugging

Unable to attach to application ... The format of the PE module is invalid

Im trying to debug a silverlight app inside it's web project.

Any time I run the debugger I receive the message:

Unable to attach to application 'WebDev.WebServer40.EXE' (PID: 8412) using '[PC-NAME]'.  The format of the PE module is invalid.

Edit: I've tried removing the SUO files, clean and build - nothing will make this error go away, and googling the phrase "the format of the PE module only pulls up THIS question...

Solution

  • Did you recently install Visual Studio Update 2? Someone else who had this same problem (http://social.msdn.microsoft.com/Forums/en-US/vstest/thread/5682aee9-942b-4c13-9986-178d1b84ea55/) fixed the issue by uninstalling Update 2.