BP_JOB_GET_PREDECESSORS: List Predecessor-Jobs of a Job
Lists the immediate predecessor job of a job. Predecessor jobs are those that must be completed (optionally, successfully completed) before the affected job can be started.
The function module returns only the immediate predecessor job, the job upon whose completion this job can start. The function module does not determine whether the predecessor job itself has a predecessor.
For more information, please see the online documentation in the function module facility (transaction SE37).