Thank you for the reply and for the welcome! I realized that the problem was in the AUTOLOAD (that I don't specify in the previous post). In fact, I'm trying to utilize a generic module for AUTOLOAD like this 
package Autoload;
use Locale::TextDomain ("kapello.it.$main::PROGRAM");

use Exporter;
@ISA = qw (Exporter);
@EXPORT = qw(AUTOLOAD);

use Carp;

sub AUTOLOAD{
    my ($self, $newval) = @_;
    # Costruisco il metodo get
    if ($AUTOLOAD =~ /.*::get_(\w+)/){
        my $property_name = $1;
        my $ref = ref($self->{$property_name});
        if ($ref eq 'ARRAY'){
            *{$AUTOLOAD} = sub { @{$self->{$property_name}} };
            return  @{$self->{$property_name}};
        }
        else{
            *{$AUTOLOAD} = sub { $self->{$property_name} };
            return  $self->{$property_name};
        }
    }

    # Costruisco il metodo set
    if ($AUTOLOAD =~ /.*::set_(\w+)/){
        my $property_name = $1;
        *{$AUTOLOAD} = sub { $self->{$property_name} = $newval };
        return  $self->{$property_name} = $newval;
    }

    # Deve esserci un errore
    croak __"Il metodo: $AUTOLOAD non è disponibile.";
}


1;

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If I create my hard coded setters and getters in module Page.pm, the problem don't arise. If I use my Autoload.pm the problem arise. ps. I modified the title in "Problem with Class and AUTOLOAD with GTK"

In reply to Re^2: Problem with Class by kapello
in thread Problem with Class and AUTOLOAD with GTK by kapello

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