ME2O
I have got the error message when I create a Delivery using ME2O which is for Providing Materials to Vendor and the error message is Essential transfer parameters are missing in record: 000001 ( Message No. VL 561).
What I missed?
1) Vendor should be created as customer (at least as ship-to party). In purch. view of vendor you need to chose flag "returns vendor".
2) Materials should have sales view open.
3) In mat.master or customer master you need to set delivery plant.
4) You need to define shipping pont depending on shipping conditions/plant/loading group
5) You need to check delivery type assignment to this process (Tr. code OMGM)
With all this set, you are on the right way.
If you have no experience with SD module an SD Consultant will be very helpful.