Couple of thoughts come to mind..

Do you have the T: drive mapped on login? If so, is it established before this is executed?

Maybe tweaking the environment -
code:
shell '%comspec% ... other stuff
Change to -
code:
shell '%comspec% /C /E:512 ... other stuff
Spark up a CMD prompt and do a CMD /? to see what is there..

HTH,

Kent
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