Sorry to hear you are having problems. I would recommend using the path from the log you generated earlier to start the GUI like this (this is the path the exe is exec'ing):
D:\glassfishv3\bin\..\pkg\python2.4-minimal\python.exe "D:\glassfishv3\bin\..\updatetool\vendor-packages\updatetool\main.py" --tty ---debug
Start this in command window. Hopefully this will generate some useful output that will help identify the root cause.
Chris
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