Here are some hard to find Operational Codes that you find in the History tab in Windows Task Scheduler. Very useful for trying to figure out why your scheduled task isn’t working.
| Op Codes | Description |
| 0 or 0x0 | The operation completed successfully. |
| 1 or 0x1 | Incorrect function called or unknown function called. |
| 2 or 0x2 | File not found. |
| 10 or 0xa | The environment is incorrect. |
| 0x41300 | Task is ready to run at its next scheduled time. |
| 0x41301 | Task is currently running. |
| 0x41302 | Task is disabled. |
| 0x41303 | Task has not yet run. |
| 0x41304 | There are no more runs scheduled for this task. |
| 0x41306 | Task is terminated. |
| 0x8004131F | An instance of this task is already running. |
| 0x800704DD | The service is not available (is ‘Run only when a user is logged on’ checked?) |
| 0xC000013A | The application terminated as a result of a CTRL+C. |
| 0xC06D007E | Unknown software exception. |