No, there's no maximum (aside from system limits). 7400*65 doesn't seem nearly big enough to be the problem.

Usually perl is pretty verbose while it's crashing. Does it say anything that might be helpful? Sometimes I crash a program on purpose to see what it's doing to me (or I did to it):

    use Data::Dumper; $Data::Dumper::Indent = $Data::Dumper::Sortkeys 
+= 1;
    die "hrm ... what is going on?!?  giant_thing=" . Dumper(\%giant_t
+hing);
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