How To Fix MN159 - Order unit missing in billing document item &

SAP Error Message - Details

• Message type: E = Error

• Message class: MN - Message class for subsequent settlement (Purchasing)

• Message number: 159

• Message text: Order unit missing in billing document item &

What causes this issue?

The system has checked whether a billing document can be created with
respect to the income attributable to the condition record. A
precondition for this is the specification of a sales unit. In the case
of a billing document for end-of-period settlement with respect to
rebate arrangements within the Purchasing area, this is the order unit.
However, the system was unable to determine a valid order unit for the
condition record.
The item number in the billing document is &V1&. Please note that in
the case of a billing document at plant level, only one totals line is
outputted in the settlement reconciliation list under the item number
in accordance with the first plant. You will find the relevant material
in this totals line.

System Response

The settlement accounting for this arrangement is faulty; if you wanted
to carry it out for real (instead of a simulation), no billing document
would be created.

How to fix this error?

Please rectify the source of the error and re-run the settlement
program for the arrangement. If necessary, contact your SAP system
administrator.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MN159 - Order unit missing in billing document item & ?

  The SAP error message MN159, which states "Order unit missing in billing document item &," typically occurs during the billing process when the system expects an order unit for a billing document item but cannot find it. This can happen for various reasons, often related to configuration or data issues in the sales and distribution (SD) module.
  Causes:
  
  Missing Configuration: The order unit may not be defined in the material master or in the sales document.
  Incomplete Data: The billing document item may not have been properly populated with the necessary data from the sales order or delivery.
  Incorrect Item Category: The item category used in the billing document may not be configured to allow for an order unit.
  Customizing Issues: There may be issues with the customizing settings in the SD module that affect how order units are handled.
  
  Solutions:
  
  
  Check Material Master: Ensure that the material master record for the item in question has the order unit defined. You can do this by navigating to the material master (transaction code MM03) and checking the relevant views.
  
  
  Review Sales Document: Verify that the sales order or delivery document from which the billing document is created has the correct order unit specified. You can check this in the sales order (transaction code VA03) or delivery (transaction code VL03N).
  
  
  Item Category Configuration: Check the configuration of the item category used in the billing document. Ensure that it is set up to allow for order units. This can be done in the configuration settings (transaction code SPRO) under Sales and Distribution > Sales > Sales Document > Define Item Categories.
  
  
  Billing Document Settings: Review the settings for billing documents to ensure that they are correctly configured to pull the order unit from the sales order or delivery.
  
  
  Customizing Settings: If there are custom developments or enhancements in your SAP system, check if they might be affecting the order unit handling in billing documents.
  
  
  Consult Documentation: Refer to SAP documentation or notes related to this error message for any specific guidance or patches that may address the issue.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MM03 (Material Master), VA03 (Sales Order), VL03N (Delivery), and VF03 (Billing Document).
  SAP Notes: Search for SAP Notes related to error MN159 in the SAP Support Portal for any known issues or fixes.
  User Exits and BAdIs: If custom logic is involved, check for any user exits or BAdIs that might be influencing the behavior of order units in billing documents.
  
  By following these steps, you should be able to identify the root cause of the MN159 error and implement a solution to resolve it. If the issue persists, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.