Thanks BeernuT!

That helps.
I changed my code like so ...

$menu->add( 'command', -label => "2nd col",
           -command => [\&addToTable,'filler',$date, 1, \@tableArray, 
+$table]);
$menu->add( 'command', -label => "3rd col",
           -command => [\&addToTable,'filler',$date, 2, \@tableArray, 
+$table ]);
[download]

... I don't really understand why I have to put in the
extra parameter ('filler'), but what the heck it works!
Thanks again!