User session is stuck on non existing document.

Hi Everyone,

I have user that has a problem with his session. Every time hi logs in an try to logson to windchill takes him to a non existing document (I believe it was a document deleted, but can't confirm it).

So i get this error mesage below. Error: Can't initialize an ObjectReference to null.

Any Ideas how to solve this problem or clean up user session?

Note: I already cleaned users IE cache, Java cache, used a different browser and computer.

thanks a lot in advance.