How To Fix MN800 - Billing document UoM is missing for item &2, settlement document &1

MN800 - Overview

• Message type: E = Error

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

• Message number: 800

• Message text: Billing document UoM is missing for item &2, settlement document &1

Self-Explanatory Message

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MN800 - Details

• The SAP error message MN800 indicates that there is a missing Unit of Measure (UoM) for a billing document item in the context of a settlement document. This error typically arises during the billing process when the system expects a UoM for a specific item but cannot find it.
  
  Cause:
  
  Missing UoM in Master Data: The most common cause is that the material master or the billing document item does not have a defined UoM.
  Incorrect Configuration: There may be issues with the configuration settings in the system related to the billing document or the material.
  Data Inconsistencies: There could be inconsistencies in the data between the sales order, delivery, and billing document.
  Incomplete Document: The billing document may not have been fully populated with all necessary data before processing.
  
  
  Solution:
  
  
  Check Material Master: 
  
  Go to the material master record (transaction code MM03) and ensure that the UoM is defined for the relevant material.
  Verify that the UoM