You didn't say what happens when it "doesn't work" but I'm guess you mean that the script die()s. If that's the case you can find out what went wrong by including the special $! variable in your die() message. For example:

    open(OUT,">/foo.csv") or die "Cannot open output file: $!";

Then when you run the script you'll see a message indicating what exactly is wrong. For example, if I run the above code without permission to open '/foo.csv' I'll see:

    Cannot open output file: Permission denied

-sam

In reply to Re: What the @#%* lost again! by samtregar
in thread problem opening and reading from a file by Anonymous Monk

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