Xcode Interface Builder crashes when I edit storyboard

Question

I\'m new to Xcode and am having problems with the IDE crashing when I use the Interface Builder. This is Xcode 4.5.

It worked properly for long enough for me to add

Answer 1

When xib files are in different formats, but are all in the same project, this will happen. In my case, some xib files were compatible for xcode5 dp, but others were for xcode 4.6

The object here is to look for differences in xib files

Hope this helps people in the future!