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my $files_to_send = map {"$stage/$_.pdf"} @{$self->_getGood()};
print map {"$_\n"} @{$files_to_send};

Can't use string ("6") as an ARRAY ref while "strict refs" in use at M
+oduleName.pm line 136.

sub _getGood {
...
    return @{$self->{_good}};    
}

$VAR1 = [
...
          'C21617783'
        ];