The file “***.app” couldn’t be opened because you don’t have permission to view it

Question

While running my project with swift code in XCode 6.3 & XCode 7, I got this error:

The file “***.app” couldn’t be opened because you don’t have

Answer 1

This can also occur if the source code you are compiling, isn't part of the target you are compiling for. To check this, select some of the source code in your project, then look to the File Inspector (on the right side, Utilities pane) for Target Membership and check that the source code is part of the target.