UPDATE: Workaround->use other AI module (AI::NeuralNet::SOM).

I am trying to pass an array reference to the AI::NeuralNet::Kohonen module but it is telling me that the input is undefined. The following code shows the gist of the input (it's a bit more complicated and is actually in a subroutine, but that is not relevant to the problem).

use strict;
use warnings;
use AI::NeuralNet::Kohonen;

push @inputs, [41 scalar entries go here];
# the above statement is actually in a loop

my $input_ref = \@inputs;
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I then try to throw it in the module and train it:

our $som = AI::NeuralNet::Kohonen->new(
        map_dim_x => $map_dim_x, # 39
        map_dim_y => $map_dim_y, # 19
        epochs => $epochs,   # 100
        input => $input_ref
    );
$som->train();
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Then I get the following error:

{weight_dim} not set at /home/gotszlin/perl/lib/perl5/site_perl/5.8.5/
+/AI/NeuralNet/Kohonen.pm line 209

AI::NeuralNet::Kohonen::new('AI::NeuralNet::Kohonen', 'map_dim_x', 39,
+ 'map_dim_y', 19, 'epochs', 10, 'input', 'ARRAY(0x926af84)', ...) cal
+led at system_net.pl line 50
    NSTAD_net::som_train(39, 19, 10, 'ARRAY(0x926af84)', 'my_first_som
+.txt') called at system_main.pl line 35
Can't call method "train" on an undefined value at system_net.pl line 
+56.
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I don't think that the weight_dim not being set has anything to do with it. I have tried other possibilities like passing @$input_ref, but that doesn't solve it. What am I doing wrong?