How To Fix AJ125 - Simulation cannot be performed due to backbilling or final billing

SAP Error Message - Details

• Message type: E = Error

• Message class: AJ - Billing program

• Message number: 125

• Message text: Simulation cannot be performed due to backbilling or final billing

What causes this issue?

You wish to simulate billing for contract &v1&. However, you have
specified <DS:TX.ISU_BACKBILLING>backbilling</> or
<DS:TX.ISU_PERIOD_END_BILLING>period-end billing</> in the rate
category &v2& for the contract, and it is not possible to simulate
billing for a billing schema with backbilling or period-end billing.

System Response

Processing is terminated.

How to fix this error?

Use transaction <DS:TRAN.EASIM01>EASIM01</> (Simulation for Backbilling
and Period-End Billing).

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AJ125 - Simulation cannot be performed due to backbilling or final billing ?

  The SAP error message AJ125, which states "Simulation cannot be performed due to backbilling or final billing," typically occurs in the context of billing processes within SAP, particularly in modules related to billing and invoicing, such as SAP IS-U (Industry Solution for Utilities) or SAP SD (Sales and Distribution).
  
  Cause:
  This error usually arises when there are certain conditions in the billing process that prevent the simulation of billing documents. The most common causes include:
  
  
  Backbilling: This occurs when there are adjustments or corrections to previous billing periods that need to be processed. If there are open backbilling items, the system may not allow a simulation to ensure that the integrity of the billing process is maintained.
  
  
  Final Billing: If a final bill has already been issued for a customer or account, the system may restrict further simulations or changes to ensure that the finality of the billing is preserved.
  
  
  Incomplete Data: There may be