We still don't have enough information. There's no obvious problem. Like vinoth.ree says, try checking for errors. I like to use this pattern with system:

system(...) == 0 or die;

Maybe sub2 is failing to open its input file. Always error-check opens as well.

open FOO, 'foo.txt' or die;

In a finished script, it's nice to have some kind of error message on the die

open FOO, '<', $filename or die "Can't open $filename: $!;

... but get that or die on there, it can save you a lot of head-scratching.

In reply to Re^4: system() issue by Anonymous Monk
in thread system() issue by Anonymous Monk

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