How To Fix CMM_MTM_ACC006 - Posting not possible; reversal document &1 for period &2, CCode &3 exists

SAP Error Message - Details

• Message type: E = Error

• Message class: CMM_MTM_ACC - Messages in MtM Accounting

• Message number: 006

• Message text: Posting not possible; reversal document &1 for period &2, CCode &3 exists

What causes this issue?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

You are not allowed to perform this posting, since the posted documents
for this accounting period have been already reversed with transaction
<DS:TRAN.CMM_MTM_ACCR>CMM_MTM_ACCR</> .

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CMM_MTM_ACC006 - Posting not possible; reversal document &1 for period &2, CCode &3 exists ?

  The SAP error message CMM_MTM_ACC006 indicates that a posting is not possible because a reversal document already exists for the specified period, company code, and document number. This error typically occurs in the context of financial postings, particularly when dealing with material movements or accounting entries.
  Cause:
  The error is triggered when you attempt to post a document (such as a journal entry or a material document) in a period where a reversal document already exists. This is a safeguard in SAP to prevent inconsistencies in financial reporting and to ensure that the accounting records remain accurate.
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check for Existing Reversal Document:
  
  Use transaction codes like FB03 (Display Document) or MB03 (Display Material Document) to check if the reversal document exists for the specified document number and period.
  Note the details of the reversal document, including its document number and the reason for the reversal.
  
  
  
  Review Posting Period:
  
  Ensure that you are trying to post in the correct period. If the posting period is closed, you may need to open it again (if allowed by your organization's policy) or post in the next open period.
  
  
  
  Adjust Your Posting:
  
  If the reversal document is valid and should remain, you may need to adjust your posting strategy. This could involve creating a new document that reflects the necessary adjustments without conflicting with the existing reversal.
  
  
  
  Consult with Finance Team:
  
  If you are unsure about the implications of the reversal document or how to proceed, consult with your finance or accounting team. They can provide guidance on how to handle the situation according to your organization's policies.
  
  
  
  Use Transaction Codes:
  
  If you need to reverse the reversal (which is sometimes necessary), you can use transaction codes like FB08 (Reverse Document) to reverse the reversal document, but be cautious as this can lead to further complications.
  
  
  
  Related Information:
  
  Document Flow: Understanding the document flow in SAP can help you see how documents are related and how reversals affect postings.
  Posting Period Configuration: Familiarize yourself with the configuration of posting periods in your SAP system, as this can affect how and when you can post documents.
  SAP Notes: Check for any relevant SAP Notes that might address specific issues or provide additional guidance related to this error message.
  
  By following these steps, you should be able to identify the cause of the error and take appropriate action to resolve it.