If you want to convert a single-valued entry into a multi-valued entry, you need to convert the scalar to an array . Like so: 
    use Config::Std;

    read_config 'test.cfg' => my %config;
    print $config{"MYSECTION"}{"element"} . "\n";

    $config{"MYSECTION"}{"element"} = [
        $config{"MYSECTION"}{"element"},
        "test2",
    ];

    write_config %config;

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Damian

In reply to Re: Config::Std multi-part problem by TheDamian
in thread Config::Std multi-part problem by carcassonne

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