Schedule lines not updating while using the BAPI_SCHEDULE_MAINTAIN
I am using BAPI_SCHEDULE_MAINTAIN to change the schedule line delivery date and schedule line quantity
while i was changing using t-code ME38 it is changing but while using the above mentioned BAPI i am getting the below errors
1)Instance PurchSchedagreement of object type <schedule agreement no> could not be changed
2)Delivery date outside period covered by factory calendar H2.