From the perlfunc documentation describing "print FILEHANDLE LIST":

If you're storing handles in an array or hash, or in general whenever you're using any expression more complex than a bareword handle or a plain, unsubscripted scalar variable to retrieve it, you will have to use a block returning the filehandle value instead, in which case the LIST may not be omitted: 
    print { $files[$i] } "stuff\n";
    print { $OK ? STDOUT : STDERR } "stuff\n";

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In reply to Re: printing to a file handle reference from a hash by GrandFather
in thread printing to a file handle reference from a hash by hershey964

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