ERS posting reversal, but not payment

Question

Hello
I am having an issue with ERS PO's in our system.
Scenario is as follows -
ERS flag isn't initially set on the PO. Then, a GR posted is from SES release, however because ERS flag isn't turned on EKRS table wasn't populated. Thus ERS would not create IR for the GR.
ERS flag was then set for the PO.
User reversed the GR. Reverse GR posted to EKRS therefore ERS batch picked up the reverse GR to post a reverse IR.
ERS will still not pick up the original GR to create a IR doc.
As a result, vendor account is incorrect and also the GR/IR is incorrect.
Any possible solutions to make correct the PO history?
Due to user error, we will always have cases where ERS flag is turned on after GR.
What is the best way to avoid this imbalanced PO scenario in the future? Should user first reverse GR prior to setting ERS fla

Answer 1

You should do the GR reversal BEFORE you change the PO to ERS.  
After you reverse the GR you then
-  change the PO to ERS
-  do the GR (receipt which is the "original" receipt of the product that you had to reverse because the ERS flag was not set)
If you see this happening alot then I'd suggest looking at your processes and improve the process to make sure this does not happen.   For example - it sounds like you are taking existing suppliers with existing POs and converting them to ERS.  This would result in POs not being checked for ERS because they were created before the supplier was an ERS supplier.   As part of the process to convert the supplier to ERS you need to add a few steps such as:
1)  identify open POs/SAs and either close them and create new ones OR convert all of them to ERS.
2)  you would also need to identify what POs/SAs have pending invoices and communicate with the supplier what paper invoices they need to send and when they should stop sending the paper invoices.
Sandra