I am having another problem with this in practice. My code seems to work, but it is producing some error messages I don't understand.
A snippet of the actual code in use:

#!/usr/bin/perl -w
use strict;

open ( SOMEFILE, '<', "$ARGV[0]" )
    or die "Can't open $ARGV[0] for reading.\n";

while (defined($_ = <SOMEFILE>))
    {
    my @cbytes = split;
    my @hbytes = map(hex, @cbytes);
    my $hstring = pack('c*', @hbytes);
    }

close SOMEFILE;
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One line of data (remember, I only used printable characters for the example):

99 00 00 00 dd 02
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And the output:

Character in 'c' format wrapped in pack at ./test.pl line 11, <SOMEFIL
+E> line 1.
Character in 'c' format wrapped in pack at ./test.pl line 11, <SOMEFIL
+E> line 1.
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Can someone tell me what is going on here? Thanks.