GR Posting in Service PO

Question

Dear Gurus,
Let me first describe the scenario:
1)Service Based PO generated say Rs100
2)GR Made for full Acc EntryDr Cost 100
                                              Cr GRIR 100
3)Credit Memo Posted Rs 20
Dr Vendor 20
Cr GRIR 20----
1
4)Invoice Generated For Rs100
Dr GRIR 100
Cr Vendor 100
We user GR bases IV.Mow I am a FICO Consultant not MM User has said he cannot clear GR/IR account I have check that credit memo posting (that is credit is not cleared  marked 1 above).
I think GR should be adjusted to the amt of credit memo.If I revoke the SES partially by Rs 20 in ML81n will the correct accounting entries be generated.
Pls help what should be done now to clear GR IR.
Pls suggest how user can do it.Correct me if I am wrong.
Regards
Prabin

Answer 1

Dear Prabhu,
I checked the Material Doc for the credit memo the qty field is blank.Actually I donot think there should be any further invoice as vendor is correctly invoiced for Rs 80 rather there should be reversal of GR.
Please help and suggest if I am wrong.
Regards
Prabin