Xcode 4 mach-o error

I coded an OSX application (not for iphone) on top of another, changed the name properly (I was eve开发者_C百科n asked if I wanted to rename all instances of the original name, and did). It compiles perfectly when I am not producing an executable, but when I do the later, it fails because its looking for a target named with the previous name of the application.

The actual faulty section of the compile process goes like this:

... build previousName.xcodeProj ....

What do I have to change so that xcode(4) stops looking for a project with the original name of the application?

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I had the same problem a while ago. Restarting Xcode was all I needed to do.