How To Fix /SAPAPO/ATP809 - Maintain the unit of measure displayed for product &1 and location &2

/SAPAPO/ATP809 - Overview

• Message type: E = Error

• Message class: /SAPAPO/ATP -

• Message number: 809

• Message text: Maintain the unit of measure displayed for product &1 and location &2

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/ATP809 - Maintain the unit of measure displayed for product &1 and location &2 ?

  The SAP error message /SAPAPO/ATP809 typically occurs in the Advanced Planning and Optimization (APO) module when there is an issue with the unit of measure (UoM) for a product at a specific location. This error indicates that the system is unable to maintain or display the unit of measure for the specified product and location combination.
  
  Cause:
  
  Missing or Incorrect UoM Configuration: The unit of measure for the product may not be defined correctly in the system, or it may be missing entirely.
  Inconsistent UoM Settings: There may be inconsistencies between the product master data and the location data regarding the unit of measure.
  Data Transfer Issues: If data is being transferred from another system (like SAP ERP), there may be issues with how the UoM is being transferred or mapped.
  Master Data Issues: The product or location master data may not be set up correctly, leading to this error.
  
  
  Solution:
  
  
  Check Product Master Data:
  
  Go to the