OK, I've managed to solve this, what I now do is use substr() and advance the position of pos(), like so: 

my $cur_pos = pos($m);
print $FH substr($m, $cur_pos, $sz);
pos($m) = $cur_pos + $sz;

[download]

works great!

In reply to Re^3: Matching n characters with m//g by medium.dave
in thread Matching n characters with m//g by medium.dave

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