Schema errors vb2010

Check your .net version target:StackOverflow discussion

Kudos for rapid response....Why would something like this simply disappear?

Thanks for the points. It's possible the solution file got corrupted, so changing the schema back to the target would fix it. I suppose one of the VS updates or something going on in a related project might have changed the setting. There's also a thread about having an orphan debugging process running .net 2 causing the schema parser to fail; sometimes the Visual Studio process don't get shut down properly, leading to unpredictable results.