How To Fix NAA043 - Customer-side calculation schema is missing for settlement document &1

NAA043 - Overview

• Message type: E = Error

• Message class: NAA - Subsequent settlement (Purchasing)

• Message number: 043

• Message text: Customer-side calculation schema is missing for settlement document &1

What causes this issue?

Settlement document &V1& does not have a calculation schema for price
determination for the customer, even though document conditions exist.

System Response

Business volume data is not updated for the customer.

How to fix this error?

Look into this matter, as it is probably due to an internal program
error.
You should therefore contact your system administrator.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

NAA043 - Details

• The SAP error message NAA043, which states "Customer-side calculation schema is missing for settlement document &1," typically occurs in the context of settlement processing in SAP, particularly when dealing with settlement documents in the context of project systems or internal orders.
  
  Cause:
  The error indicates that the system is unable to find a valid calculation schema for the customer side of the settlement document specified (denoted by &1). This can happen due to several reasons:
  
  
  Missing Configuration: The calculation schema for the customer side may not be defined in the system. This could be due to incorrect or incomplete configuration in the relevant modules (e.g., Project System, Controlling).
  
  
  Incorrect Assignment: The settlement document may not be correctly assigned to a calculation schema, or the assignment may be missing for the specific customer or project.
  
  
  Data Inconsistencies: There may be inconsistencies in the master data related to the customer or the project that prevent the system