The designer encountered an error while loading the table definition?

Question

I\'ve problem with Visual Studio 2012 Ultimate.

I inserted a \"Sql Server Database\", and when I try to \"Add new table\" after a while I get this problem

Answer 1

Restarting Visual Studio fixed it for me. I’d had it open for a month or more.

Might be worth it to some people to try this simple step first before digging in deep.