Xcode Internal error and no project opens

Im on 10.6 and using xcode 3.2.6. On xcode launch (however i launch) i get an xcode "internal error' popup telling me:

File: /SourceCache/DevToolsBase/DevToolsBase-1809/XcodeFoundation/Specifications/XCSpecification.m

Line: 448

Object:

Method: registerSpecificationProxiesFromPropertyListsInDirectory:recursively:inDomain:inBundle:

path should be a string, but it is nil

I can 'quit' or 'continue'. Continue launches xcode. The problem is that once open if i doub开发者_如何学JAVAle click an .xcodeproj - nothing happens within xcode. To open a project I have to manually go file->open and navigate to the file.

Google gives a couple of similar issues - including this one

http://lists.apple.com/archives/mac-games-dev/2011/Mar/threads.html#00001

And i've tried everything i can think of with no joy, (Including down grading to the xcode on the OS DVD).

It looks like it can be an issue with whatever particular version of Xcode that you have running. It might be a good idea to get the latest and greatest to see if it's an issue with the Xcode software itself.

I was just hitting this and fixed it by removing a dead symlink at:

~/Library/Application Support/Developer/Shared/Xcode/Plug-ins

This thread tipped me off (although it wasn't Airplay in my case).