As with all WebSphere MQ Everyplace queue managers, registries and messages are left on the system after the queue manager has been shut down. This design allows queue managers to restart witout losing their messages or recreating all their queues and registry settings. If, one of the examples crashes on starting, the data they leave behind should automatically be removed to prevent them from being restarted with an incomplete registry. If the example does not crash, or you wish to start the queue manager from scratch, you can use the following methods to remove the registry from the system: