Xcode Internal Error upon building

I'm having a very annoying problem with my xcode that I desperately need help with.

Every time I build (or clean) an app, Xcode errors with:

Internal Error: File:   
/SourceCache/DevToolsBase/DevToolsBase-1763/pbxcore/Infrastructure/XCWorkQueueOperation.m Line: 895 Object: <XCWorkQueueOperation:0x204e8f820> 
Method: runOpe开发者_JAVA技巧ration

Assertion failed: commandInvocations[slotIdx] == nil

And it presents me with the option to Quit Xcode or continue.

There seems to be absolutely nothing on Google about this error! And I am completely stuck. I have reinstalled Xcode and all. Rebooting does no good.

Does ANYONE have any idea how to fix this error?

Xcoder version: 3.2.5 on 64-bit OSX 10.6.4

Cheers, Brett

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Try this: "Rebuild Code Sense Index" button in the "General" tab for the inspector for the project. (from http://forum.soft32.com/mac/XCode-project-problem-ftopict47829.html)

Also see the following: https://lists.apple.com/archives/xcode-users/2008/Feb/msg00550.html

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You can allways upgrade to the GM of XCode 4, if everything else fails.

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I reinstalled xcode and it went away

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If the problem persists after a full reinstall of xcode, your user settings are probably corrupt. Delete them from a terminal prompt:

rm -rf ~/Library/Application Support/Developer/Shared/Xcode/