Causes This means that the application is unable to load the EDMX. Your connection string might be wrong. you might not have changed it, but if you have changed other things (say, the name of an assembly), it could still be wrong. You might be using a post-compile task to embed the EDMX in the... Continue Reading →
Solution If there is no such file on the path that is mentioned in the error, then it is just because the build of the problematic project is failed. Just comment all the lines of code that are causing error(s) and build the project again. The error will be gone.