I got your point and as I said I will do so in the future. I am not saying you won't be able to help me, I just wanted to know other possible solutions (thanks to you all! :-)) - that's all.

In the meantime, a tireless user from the par mailing list actually solved the problem I had using pp. It was a problem with Digest's autoload functionality which collided with pp.

par.pl calling eval { $Digest::SHA::VERSION }; introduces the global variable $Digest::SHA::VERSION to %{"Digest::SHA::"} which causes Digest to skip require Digest::SHA. You get around this by adding use Digest::SHA to your code. Easy, once you know it. :-)