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Message: [QUOTE="Steve Grazzini, post: 4745894"] It's true that "system LIST" is exempt from taint-checking, but if this were actually a taint problem, you'd get an error of the form Insecure dependency in foo ... Insecure $ENV{FOO} ... Taint-checking doesn't cause things to silently fail! Look, if you don't know what's going wrong, please just show us a small-but-complete script that demonstrates the behavior. If it fails from cron/CGI/etc and you haven't even tried it from the command-line, you should go try it from the command-line first. Well you're right that exec() can fail, but just exit() isn't very useful either. exec $whatever; die "couldn't exec $whatever: $!"; [/QUOTE]