Appreciate all the great answers from Dom, Andrew and others. I've learnt a great deal about IPC :-).
I have another questions: using transaction VOFM --> Requirements --> Pricing in R3, I can select a particular requirement e.g., 900, to view source. I noticed there are two forms together once I view routine 900:
sy-subrc = 0.
Would anyone be able to tell me why two forms here? we need reproduce the "pricing requirement 900", how do we deal with kobev_900?
Thank you in advance,