ios - Interface builder not loading in xcode -

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i using xcode version 3.2.6 , ios sdk 4.3. created new view based app (iphone or ipad). after double clicking on view controller xib , interface builder not loading up. seems it's attempting open, nothing.

have thoughts?

xcode 3.2.6 has separate ib sdk. so, can try open file interface builder, or if problem persists, can reinstall xcode. maybe "built-in" bug, happened me too, many times.


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