sub reportWA{  # $key
  my $key = shift;

  my $NewWA;

  unshift @{ $WA{ $key }{ stags } }, $WA{$key}{PT};
#............^

  $NewWA = $WA{ $key }{ PT };

  $#{ @{ WA{ $key }{ stags } } } = $rnds-1;
#........^ ......missing $

for my $i (1..$rnds-1){
    ${ WA{ $key }{ stags } }[ $i ] *=  $wght;
#......^...missing $
    
    $NewWA += ${ WA{ $key }{ stags } }[ $i ];
#................^..........missing $    
  }
  #plog sprintf "stages =  %s" ,join (", ",@stags);
  $NewWA /= $rnds;
  
  printf " %d  %d  %8.2f    %s\n" , 
       $key, $WA{ $key }{ PE },
       $NewWA, join( ", ", @{ WA{ $key }{ stags } } );
#.............................^......missing $       
}