for my $family ( sort keys %HoH ) 
{
    print "$family: ";
   for my $role ( keys %{ $HoH{$family} } ) 
   {
         print "$role=$HoH{$family}{$role} ";
    }

   print "\n";

    print "$family: @{ $HoA{$family} }\n";
}

[download]

The %HoA and the %HoH have the same keys, yet I get the error:
Can't use an undefined value as an ARRAY reference

[download]

in the line: 
print "$family: @{ $HoA{$family} }\n";

[download]

In reply to What is wrong in this syntax? by Anonymous Monk

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