In your for loop, $ref_b->[$i] doesn't exist for $i greater than 2. Consequently, as soon as $i == 3, you get the error you see.

What do you want to push onto @{$ref_a->[$i]} when $i is 3, 4 or 5 ?

Cheers,
Rob

In reply to Re: Undefined Array Reference by syphilis
in thread Undefined Array Reference by Anonymous Monk

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