Correct me if I'm wrong, but I believe enabling can either be present with value 'on' or absent.

If so, the provided solutions are overkill and all you need is 

my $c_enabling = param('enabling')
...
if ($c_enabling)

[download]

In reply to Re: Getting rid of an uninitialized warning by ikegami
in thread Getting rid of an uninitialized warning by jonc

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