Nothing has changed right? No changes in group membership, MS updates, new printers, etc......?
Does the script run correct if you run it manually after logon?
It is very difficult to troubleshoot this whit the info that we have so far. There must be some kind of change (everything matters, also the smallest things) because a working script does not stop working just like that.

Can you post your script?
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Mart

- Chuck Norris once sold ebay to ebay on ebay.