How To Fix MEPO859 - System changing distribution logic from percentage to quantity based

MEPO859 - Overview

• Message type: E = Error

• Message class: MEPO - New Purchase Order Dialog

• Message number: 859

• Message text: System changing distribution logic from percentage to quantity based

What causes this issue?

You have set the <DS:DE.AA_FINAL_IND>final account assignment indicator
</> for an account assignment item. For the corresponding purchase
order item you have selected distribution by percentage. The difference
between the orginally planned quantity for the item with the final
account assignment indicator and the <DS:DE.AA_FINAL_QTY>account
assignment quantity</> must be redistributed across the remaining open
account assignment items. With distribution by percentage this is not
possible. For this reason we recommend that if you want to work with the
final account assignment indicator you do not use distribution by percen
tage.

System Response

The system changes the distribution logic from distribution by
percentage to distribution by quantity. This new distribution logic a
pplies to all account assignment items in the related purchase order
item.

How to fix this error?

There are different ways of balancing the difference in quantity that
arises when you set the final account assignment indicator for an item.
You can reduce the quantity at purchase-order-item level by the quantity
difference in question.
You can specify In a Business Add-In (BAdI) how the system should
distribute the quantity difference across the remaining open account
assignment items.
You can distribute the quantity difference manually across the remaining
open account assignment items.
You can add new account assignment items and post the quantity
difference to these items.

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.

Smart SAP Assistant

• What is the cause and solution for SAP error message MEPO859 - System changing distribution logic from percentage to quantity based ?

  The SAP error message MEPO859 indicates that there is a change in the distribution logic for a purchase order or a contract from percentage-based distribution to quantity-based distribution. This typically occurs in the context of purchase order processing or contract management within the Materials Management (MM) module of SAP.
  
  Cause:
  
  Inconsistent Distribution Logic: The system detects that the distribution logic defined for the purchase order or contract is inconsistent with the data being processed. For example, if the system expects a percentage-based distribution but receives quantity-based data, it will trigger this error.
  Changes in Item Data: If there are changes made to the item data (like changing the quantity or the distribution method) after the initial entry, it may lead to this error.
  
  Configuration Issues: There may be configuration settings in the system that dictate how distribution should be handled, and these settings may not align with the current transaction.
  
  
  Solution:
  
  Review Distribution Logic: Check the