How To Fix AJ561 - Document number &1 of contract &2: error during simulation run

AJ561 - Overview

• Message type: E = Error

• Message class: AJ - Billing program

• Message number: 561

• Message text: Document number &1 of contract &2: error during simulation run

What causes this issue?

For technical reasons, the system attempted to simulate a billing for
contract &V2& for the period &V3& to &V4& while directly undoing a
contract/customer change for document number &V1&.
The previous message contains the exact cause of error.
This only applies if the <LS>MES</> field is selected in the routine
BILLING_RUN_CHECK in the include LEAWTF01.

System Response

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

How to fix this error?

Due to this error, it is not possible to automatically undo the
complete procedure.
Separately carry out each necessary action manually.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

AJ561 - Details

• The SAP error message AJ561 indicates that there was an error during the simulation run for a document related to a contract. This error typically occurs in the context of contract management or billing processes within SAP, particularly when dealing with contract documents and their associated transactions.
  
  Cause:
  The error can be caused by several factors, including but not limited to:
  
  
  Data Inconsistencies: There may be inconsistencies in the data related to the contract or the document number, such as missing or incorrect entries in the database.
  
  
  
  Configuration Issues: Incorrect configuration settings in the contract management module or related areas can lead to simulation errors.
  
  
  Authorization Issues: The user may not have the necessary authorizations to perform the simulation run for the specified contract.
  
  
  Technical Errors: There could be underlying technical issues, such as problems with the database or application server.
  
  
  Business Logic Errors: The business logic defined in the system may not be able to handle