The following code tells me that no new sub can be found in package STRTicket. While true technically... the @ISA is supposed to enable inheritance... I thought. In this case the empty sub class fails.

All classes are in the same monolithic source file. USE doesn't appear to like that and searches for actual .pm files... so I used import which seems to give me the symboltables (Ticket->new works for instance... but inheritance appears to fail ( Empty sub-class test fails). So What... if anything else am I supposed to do when everything is in a single file to use an object and its subclasses?

my $t = new STRTicket(); 


package Ticket;

  sub new {
    my $class = shift;
    my $ticketid = shift;
        my $self= {
                    'TICKETID'  => undef,
                    'SOURCE'    => undef,
                    'CREATEDBY' => undef,
                    'OWNER'     => undef,
                    'MODIFIEDBY'=> undef,
                    'CREATEDON' => undef,
                    'MODIFIEDON'=> undef,
                    'COMPANYNAME'=> undef,
                    'STATE'     => undef,
                    'STATUS'    => undef,
                    'BZTICKETS' => (),
                    'AGE'       => undef,
                    'TITLE'     => undef,
                    };
  
        bless $self, $class;
        if ( defined $ticket) {
          $self->{'TICKETID'} = $ticket;
        } 
        else {
        die "Ticket object instantiated without a ticket id! This shou
+ld never happen.\n";
        }
        return $self;
  }
  
  sub load_bztickets($){
    my $self= shift;
    my $dbh = shift;  # pass in the database reference for Bugzilla
    
  }
1;
package BZTicket;
  import Ticket;
 # use Ticket;
  @ISA = ('Ticket');

1;

package CRMTicket;
  import Ticket;
  #use Ticket;
  @ISA = ('Ticket');

1;

package STRTicket;
  import Ticket;
#  use Ticket;
  @ISA = ('Ticket');

1;
[download]