I have no experience with any of the AI modules, but have you tried 
my $som = AI::NeuralNet::Kohonen->new( ... ) || die "could not instani
+ate AI: $!\n";

[download]

If an object is not defined after trying to instantiate it, it usually means the instantiation of that object failed. Examine why.

Ivan Heffner
Sr. Software Engineer
WhitePages.com, Inc.

In reply to Re: Can't call method on undefined value by Codon
in thread Can't call method on undefined value by ICECommander

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