Looking at your code I would guess that getservbyport() is returning undef which means that $svcwatch will also be undefined. Try adding the following to be sure:

my $svcwatch =
   ( $name !~ /^#/ ) ? getservbyport ( $port, $proto ) : next;

if (! defined $svcwatch) {
   warn("getservbyport return undef");
}

[download]
-- vek --

In reply to Re: Use of uninitialized value warning on print by vek
in thread Use of uninitialized value warning on print by tcf03

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