How To Fix /SAPAPO/MA911 - Unit conversion is not possible from &2 to &3 for product &1

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/MA -

• Message number: 911

• Message text: Unit conversion is not possible from &2 to &3 for product &1

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/MA911 - Unit conversion is not possible from &2 to &3 for product &1 ?

  The SAP error message /SAPAPO/MA911 indicates that there is an issue with unit conversion for a specific product in the Advanced Planning and Optimization (APO) module. The message typically states that a conversion from one unit of measure (UoM) to another is not possible for a given product.
  Cause:
  
  
  Missing Unit of Measure (UoM) Conversion: The most common cause of this error is that there is no defined conversion factor between the two units of measure (UoM) specified in the error message. For example, if you are trying to convert from "liters" to "gallons" and there is no conversion defined in the system, this error will occur.
  
  
  Incorrect Configuration: The configuration for the product in question may not have the necessary UoM settings or may be incorrectly set up.
  
  
  Master Data Issues: The product master data may be incomplete or incorrect, particularly in the area of UoM definitions.
  
  
  Inconsistent UoM Usage: The product may be used in different contexts (e.g., planning, production) where different UoMs are expected, leading to confusion in conversions.
  
  
  Solution:
  
  
  Define UoM Conversion:
  
  Go to the transaction code CUNI (Unit of Measure Conversion) in SAP.
  Check if a conversion exists between the two units of measure mentioned in the error message.
  If it does not exist, create a new conversion entry with the appropriate conversion factor.
  
  
  
  Check Product Master Data:
  
  Use transaction code MM03 to view the product master data.
  Ensure that the UoM settings are correctly defined for the product, including base UoM and alternative UoMs.
  
  
  
  Review Configuration:
  
  Check the configuration settings in the APO system related to UoM and ensure they are set up correctly.
  You may need to consult with your SAP Basis or configuration team if you are not authorized to make changes.
  
  
  
  Consistency Check:
  
  Ensure that the UoM used in planning, production, and other processes is consistent and correctly defined in the system.
  
  
  
  Testing:
  
  After making the necessary changes, test the conversion again to ensure that the error is resolved.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  CUNI: Unit of Measure Conversion maintenance.
  MM03: Display Material Master.
  CMM1: Maintain UoM for a material.
  
  
  
  Documentation: Refer to SAP Help documentation for detailed information on UoM management and conversion settings.
  
  
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to UoM conversions in your version of SAP.
  
  
  By following these steps, you should be able to resolve the /SAPAPO/MA911 error and ensure that unit conversions for the specified product are correctly configured in your SAP system.