We need to delete a predecessor of a job using the GJTRABTR utility dynamically via JCL.
To delete a predecessor using the GJTRABTR utility, use the following as input:
MOD(JOB(NNNNNNNN) P(-PREDJOB))
The value NNNNNNNN represents the name of the job that needs to have its predecessor deleted. The value PREDJOB is the name of the predecessor job that is to be deleted.