You get this error when compiling your application in Visual Studio .NET:
Need to map to server location.
Check the following access permissions:
You have full read-write access to the file path of the file being compiled.
You have full access to your application’s URL.
http://www.experts-exchange.com/Programming/Programming_Languages/Dot_Net/ASP_DOT_NET/Q_21286343.html
http://www.issociate.de/board/post/207861/Unable_to_open_the_Web_project.html.
Part VII: Troubleshooting Applications
Application Generation and Compilation Error Messages