Solution : https://service.sap.com/sap/support/notes/749262 (SAP Service marketplace login required)
Key words :
unwanted rescheduling reason, terms block planning, previous block, production orders, fixed blocks, component quantity, planned orders, conversion indicator, order number, program error
Related Notes :
579758 | R/3->APO: Retaining APO scheduled activity dates |
572644 | Retaining activity dates: Implementation |