Dequeue with OCCI does not remove the message from the queue

Question

Hey there,
I have this problem where no matter what dequeue option I try the messages never seem to be removed from the queue... I tried looking around and found only a similar un-answered question...
Thanks in advance...
void TryAnydataDequeue(oracle::occi::Connection * conn)
     try
          std::cout << "Dequeue Commence..." << std::endl;
          Consumer cons(conn);
          //Settings de dequeue
          cons.setCorrelationId("SPPC");
          cons.setQueueName("Anydata_queue");
          cons.setConsumerName("SNOOP");
          cons.setDequeueMode(cons.DEQ_REMOVE);
          //cons.setDequeueMode(cons.DEQ_LOCKED);
          std::cout << "Reception du message..." << std::endl;
          Message m2 = cons.receive(Message::ANYDATA);
          AnyData any(conn);
          any = m2.getAnyData();
          if(!any.isNull())
               oracle::occi::TypeCode type = any.getType();
               if(type == OCCI_TYPECODE_VARCHAR2)
                    std::string msg = any.getAsString();
                    std::cout << "Message Reçu: ";
                    std::cout << msg << std::endl;
               else
                    std::cout << "Format du message invalide..." << std::endl;
               std::cout << "Fin du message... (Press a key)" << std::endl;
          else
               std::cout << "Message invalide..." << std::endl;
          System::String * theInput = System::Console::ReadLine();
     catch(SQLException ex)
          std::cout << "Exception: " << ex.getErrorCode() << " - " << ex.getMessage() << std::endl;
          System::String * tnput = System::Console::ReadLine();
}

Answer 1

The message from the queue will be removed when you do a commit after a successful dequeue call, depending upon your message retention settings.
After you have done this processing and successfully performed a commit, what is the output of the following query:
SQL> connect AQADMIN/password
SQL> select msg_state from aq$<your_queue_table_name_goes_here> ;?
If it is PROCESSED, check your queue retention settings.
Additionally, make sure that the init.ora parameter AQ_TM_PROCESSES is set to a NON-ZERO value for this to happen.