It won't work because you're trying to append the return value of print (which is a status code) to $output in the first example, and you're trying to print to $output (which is a string, not a filehandle) in the second example.

You (probably) just want 

$output .= $tmpl_object->output();

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In reply to Re: Append object output to scalar by Joost
in thread Append object output to scalar by mhearse

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