Document with origin R4 cannot be reversed -error msg EB049

Question

We have an invoice with 2 posting relevant items, the energy charge and a renewable energy credit.  the latter was generated as zero (valid condition) and posted as a Cr transaction. 
this is the only instance of this scenario as normally the zero amounts post as Db rather than Cr.  we upgraded a week ago to SAPK-60308INISUT, could this have caused a change in the main/sub used for posting these zero amounts?
The DFKKOP line item for the zero amount has cleared against itself, and now clearing reset cannot be performed.
error generated is Document XXXXXXXXX with origin R4 cannot be reversed, message number EB049.
The invoice needs to be reversed as its based on an estimated reading that needs changing, and the invoice won't reverse because of the clearing reset issue.
I've researched the error number and can see a few related notes but they were all fixed some time ago and were different scenarios - move-outs and statistical BPP, neither applies in this case.
Please can anyone provide help as to how the clearing can be reset so the invoice can be reversed.
Many Thanks
Astrid

Answer 1

Hi David
EA13 is configured to allow for clearing reset of both fully cleared and partially cleared invoices, and we have numerous cleared invoices that get reversed every day, but this is the first time we've seen this error.
I think the underlying issue is that the zero amount transaction is getting posted as a credit rather than a debit.  We've been able to set up the situation in a system that still has the old code, and there it posts as a debit, clears against itself, and can be reversed.
In the QA region which is at the same new version as production, it posts as a self cleared Cr transaction and again can't be reversed.
Besides getting  a fix to get make the zero amounts post as debits again, we also need to find a way to reverse the bad invoice in production.
Thanks