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

J2643 - Overview

• 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

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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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