When Java Apps don’t start in OS X…

I had a problem recently – I use IntelliJ at work, and one day it just stopped launching on my Mac altogether. Looking at the console, I found:

10/23/08 4:13:16 PM idea[248] Apple AWT Startup Exception : *** -[NSCFArray insertObject:atIndex:]: attempt to insert nil 

Googling for that error I was led to this Apple support thread, which says:

You might want to check that the symlink:


points to:


As described in this post:


Sure enough, my symlink was wrong! I’d completely forgotten I’d mucked around moving symlinks, and honestly can’t remember now why I ever did in the first place. Pointing the Current link back to A solved the problem, and IntelliJ starts up just fine.


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