This example doesn't have a line 209, but one of the places you use %{ } or {key}{key}{key} is trying to deref a "2". It seems to me that in the code that builds the hash structure, you have a $myhash{key} = 2;

Without strict refs, something odd happens:

use Data::Dumper;
no strict 'refs';
$x = 2;
$x->{hrm} = "weird";

print "", Dumper([%{2}]), "\n";  # odd
[download]

It's allowing you to build a hashref with the name of "2", but it almost certainly isn't what you want.