Hi perl_diver,

The convention is that when a program fails it exits with a nonzero exit code. Assuming your "PipeLine.pm" follows this convention, success would be indicated by system returning zero, and failure by a nonzero return value. How to inspect the exit code (which is also stored in $?) is also documented in system. So you could write your code like this (untested):

foreach my $f (@Folders) {
    if ( system("PipeLine.pm",$f,"my.Config.ini") != 0 ) {
       warn "Failure when processing file $f, \$?=$?\n";
    }
}
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Hope this helps,
-- Hauke D