I do not know why, but here are some things to look at.

Does printing the value of $! give you any clues?

rename("uaspf.txt", "uaspf.txt.bak") or die"Unable to replace:$!\n";

Alos, take a look at rename because there are portability issues with this function.

In reply to Re^3: Swapping Files by toolic
in thread Swapping Files by deadpickle

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