Either that or use a default value

    # Load the keywords used
    my $terms = '';
    if ($s->{terms}) {
        $terms = join ' ', @{$s->{terms}};
    }
[download]

or:

    # Load the keywords used
    my $terms = 'some default value';
    if ($s->{terms}) {
        $terms = join ' ', @{$s->{terms}};
    }
[download]

Or, even better might be to allow Soapbox.pm to handle undef values

HTH,
Charles K. Clarkson