you expect that increment call SomeData::add, but it calls MyNumber::add. Because it is a MyNumber object. If you do not want that, write in package SomeData 
sub increment {
    my $self = shift;
    $self->SomeData::add(number => 1);
}

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Boris

In reply to Re: inheritance turns back and bites by borisz
in thread inheritance turns back and bites by dada

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