Dear Ayush,
Rescheduling customizing:
You can find the rescheduling customizing on transaction OMDW or access I directly the following SPRO path:
For the plant, you will find the following options:
Rescheduling horizon: It is the number of day for which the system checks whether the fixed replenishment elements should be rescheduled. The rescheduling horizon is calculated in working days, according to the plant factory calendar and it starts on the end of the replenishment lead time.
Firmed elements: You can define which specific elements will be included on the rescheduling check. If the flag is unchecked, MRP will not consider the element during the rescheduling check.
Comparison values: If the difference between the requirement date and the firmed receipt element is less than the tolerance value, system will not display an exception message.
The rescheduling horizon and the firmed elements can also be defined at MRP Group level.
It is also possible to reach the rescheduling customizing for the plant through transaction OPPQ and for the MRP group through transaction OPPR
if not also check the following:-
It is also possible to reach the rescheduling customizing for the plant through transaction OPPQ and for the MRP group through transaction OPPR.
Please check the table MDTB-UMDAT.
Re scheduling date is there or not & also please let it check the program SAPMM61R with help of Abaper.