Liz, Thanks.. I have to use a hash since I am controling many computers, and each key of my hash controls a computer. Therefore, when the node returns, I need to know its done so I can send more work. I will check out the modules sugested. I was really worried if there was something wrong with my code but as you mentioned, it really seems to be a leak in the perl threads...If there is any other work around please keep me posted,
Thanks,
Paulo Carvalho