HI
Report RCPTRAN4 or transcation CFP1 is used to evalvate and transfer data.
It depends on your business requirement i.e. whether you need the master data changes to be transferred from ECC to APO immediately or periodically. Use t.code CFC9 to configure the mode of change transfer of master data.
But, the prerequisite is to have an active integration model (use report RIMODGEN, RIMODAC2) and activation of ALE change pointers (t.codes BD61 and BD50).
If you select periodic transfer in CFC9, you need to use t.code CFP1( RCPTRAN4) to send the changes to APO. On the other hand, if your choice is immediate transfer, then CFP1 need not to be executed.
Thanks and regards
Raja kiran R