How To Fix AH660 - Manual credit memo/backbilling &1 cannot be reversed

AH660 - Overview

• Message type: E = Error

• Message class: AH - IS-U billing (master data)

• Message number: 660

• Message text: Manual credit memo/backbilling &1 cannot be reversed

What causes this issue?

A manual credit memo/backbilling with no link to invoicing/accounts
receivable and/or payable cannot be reversed with the billing reversal
function.

System Response

Processing was canceled

How to fix this error?

You may need to delete the document using a function key in Transaction
EA16.

Error message extract from SAP system. Copyright SAP SE.

AH660 - Details

• The SAP error message AH660, which states "Manual credit memo/backbilling &1 cannot be reversed," typically occurs when there is an attempt to reverse a manual credit memo or backbilling document that is not eligible for reversal. Here are some potential causes, solutions, and related information regarding this error:
  Causes:
  
  Document Status: The credit memo or backbilling document may be in a status that does not allow for reversal. For example, if the document has already been cleared or settled, it cannot be reversed.
  Document Type Restrictions: Certain document types may have restrictions on reversals based on company policy or configuration settings in SAP.
  Posting Period: The posting period for the document may be closed, preventing any changes or reversals.
  Dependencies on Other Documents: The credit memo may be linked to other documents (like invoices) that have already been processed, making it impossible to reverse the credit memo.
  Authorization Issues: The user attempting the reversal may not