VOILA! THIS WORKS! 

$tnum=0;
foreach $thread (keys %threads) {
    $tsub[$tnum] = $thread;
    $tsize[$tnum] = @{$threads{$thread}};
print "\n\ttsize[tnum]= @tsize[$tnum]"; #dbg

   for ($i=0; $i<$tsize[$tnum] ; $i++) 
    { $tlist[$tnum][$i] = $threads{$thread}[$i];
print "\n\t{threads{thread[$i]}}= $threads{$thread}[$i]"; print "\n\tt
+list[$tnum][$i]= $tlist[$tnum][$i]"; #dbg
        }
    $tnum++;
}
}

[download]
I had an extra ${...} around the assignment statement in the inner loop! Thanks to all who made suggestions! Harvey

In reply to Re^3: syntax of multidimensional arrays and hashes by hsfrey
in thread syntax of multidimensional arrays and hashes by hsfrey

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