Are you *sure* this is the code you're running? When I run it, I get "Not a coderef" (after installing Barcode::DataMatrix)

That error is caused either when you call a legit method on a class/object, but you haven't use Barcode::DataMatrix; (but you have), or you've loaded the module, but the method doesn't exist (in this case it does). This is often caused by a typo... like typing new() as nw() by accident.

Test this yourself with this tiny sample and see what happens...

use strict;
use warnings;

use Barcode::DataMatrix;
use Safe;

my $mat = Barcode::DataMatrix->new()->barcode( 1 );
print $mat;
[download]

You should get similar output to this:

$ ./bc.pl
ARRAY(0x1960758)
[download]

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