Hi,

Problem is this code

package GroupSystem;
sub new {
   my $class  = shift;
   my $self = [{}];
[download]

That uses a experimental feature called "pseudo hash" that was deprecated in Perl 5.8.0 (2002-Jul-18) removed in Perl 5.10.0 (2007-Dec-18)

Therefore, the fix is much simpler than presented in Re^3: Error with CPAN module XML-BMEcat,

the fix is to inherit from Class::PseudoHash

package GroupSystem;

use Class::PseudoHash;
@GroupSystem::ISA = 'Class::PseudoHash';
[download]