How To Fix J2643 - &4 Reverse function only possible in update run

SAP Error Message - Details

• Message type: E = Error

• Message class: J2 - Message Class for Development Class JBT

• Message number: 643

• Message text: &4 Reverse function only possible in update run

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message J2643 - &4 Reverse function only possible in update run ?

  The SAP error messages J2643 and J2644, which state "Reverse function only possible in update run," typically occur in the context of the SAP system's handling of financial documents, particularly in the area of document processing and updates.
  Cause:
  
  
  Update Run Context: These error messages indicate that the reverse function (e.g., reversing a financial document) is being attempted in a context that is not an update run. In SAP, certain operations, such as reversing documents, can only be performed during specific processing phases, particularly during the update run when the system is ready to commit changes to the database.
  
  
  Batch Input Session: If you are using batch input sessions or background processing, the reverse function may not be allowed unless the session is in the correct state (i.e., an update run).
  
  
  Transaction State: The transaction may be in a state that does not allow for reversals, such as being in a display mode or not being fully processed.
  
  
  Solution:
  
  
  Check Transaction Mode: Ensure that you are executing the reverse function in the correct mode. If you are in a batch input session, make sure it is set to run in update mode.
  
  
  Run in Update Mode: If you are using a custom program or transaction, ensure that it is designed to handle updates correctly. You may need to adjust the program logic to ensure that the reverse function is called during the update phase.
  
  
  Review Document Status: Check the status of the document you are trying to reverse. Ensure that it is eligible for reversal and that no other processes are locking it.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for specific details on the transaction you are working with. This can provide insights into the requirements for reversing documents.
  
  
  Contact SAP Support: If the issue persists and you cannot determine the cause, consider reaching out to SAP support for assistance. They can provide more detailed troubleshooting based on your specific system configuration and version.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes related to document processing, such as FB08 (Reverse Document) or others that may be applicable to your scenario.
  SAP Notes: Check for any SAP Notes related to these error messages, as they may provide patches or additional guidance.
  System Logs: Review system logs (SM21) and application logs (SLG1) for any additional error messages or warnings that may provide context for the issue.
  
  By following these steps, you should be able to address the error messages J2643 and J2644 effectively.