On a windows command line, your parameters are all (white?)space separated. If you want a zero-length parameter you need to double quote it so it isn't ignored, like so:

USAGE:  mangle.exe [filename] [password] [index number]
mangle.exe unprotected.dat "" 42

[download]

Parameters that are all whitespace have the same problem and solution.

No idea on why it had to be done that way though.

In reply to Re^2: Proc::Background does not take file path with spaces by SuicideJunkie
in thread Proc::Background does not take file path with spaces by dinasour

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