Replace 
my $c_enabling = param('enabling');

[download]
with 
my $c_enabling = param('enabling') || '';

[download]
If $c_enabling can never have '0' as a valid input;

otherwise 

my $c_enabling = param('enabling');
$c_enabling = '' unless defined $c_enabling;

[download]

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

Title:
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