Parent: $root.$constants
| kWorkerAlreadyRunning | Worker is already running and $waitforcomplete is kTrue |
| kWorkerBadPool | Unable to access named session pool |
| kWorkerBadSession | An invalid session object was passed |
| kWorkerMissingParams | There are one or more missing parameters |
| kWorkerNotInitialized | Worker must be initialized before it can run |
| kWorkerPoolFailed | Unable to obtain a session from the session pool |