Hi,
Right after I posted the thread, I came across SAP Note 1960778
The Note implies that due to batch input creation of the maintenance plan, MPLA-CALL_CONFIRM field can be marked with a lower-case x. However, the program expects an upper-case X in this field and therefore ignores the completion requirement.
I will correct the table entries via debugging as suggested.
Thanks for your kind response.
Sincerely,