ORA-15607
Autonomous task could not be scheduled. Reason: "string".
Cause
An attempt was made to schedule a manual Autonomous task but the operation failed. The possible causes were:
- The task was disabled.
- The task was currently running in another process.
- The number of concurrently running autonomous tasks exceeded max limit.
Action
Check the task status in adb_task views. Ensure that:
- The task is enabled.
- The task is not currently running in another process.
- The number of concurrently running autonomous tasks is within max limit.
Then, retry the operation.