How To Fix /PLMI/BO_RFO021 - Unit of measure of output item changed to unit of mass

SAP Error Message - Details

• Message type: E = Error

• Message class: /PLMI/BO_RFO -

• Message number: 021

• Message text: Unit of measure of output item changed to unit of mass

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /PLMI/BO_RFO021 - Unit of measure of output item changed to unit of mass ?

  The SAP error message /PLMI/BO_RFO021 indicates that the unit of measure (UoM) for an output item in a production order or process has been changed to a unit of mass. This typically occurs in the context of production planning and execution, particularly when dealing with materials that have different units of measure for input and output.
  Cause:
  
  
  Mismatch in Units of Measure: The error usually arises when there is a mismatch between the unit of measure defined for the input materials and the output materials in a production order. For example, if the input is measured in liters and the output is expected in kilograms, SAP may automatically convert the output to a unit of mass.
  
  
  Configuration Issues: There may be configuration settings in the material master or in the production order that dictate how units of measure are handled. If these settings are not aligned, it can lead to this error.
  
  
  Material Master Settings: The material master data for the output item may not be correctly set up to handle the conversion between different units of measure.
  
  
  Solution:
  
  
  Check Material Master Data: Review the material master data for both the input and output materials. Ensure that the units of measure are correctly defined and that the conversion factors are set up properly.
  
  
  Review Production Order Settings: Check the production order settings to ensure that the output item is correctly defined with the appropriate unit of measure.
  
  
  Adjust Configuration: If necessary, adjust the configuration settings in the SAP system related to units of measure. This may involve working with your SAP configuration team to ensure that the settings align with your business processes.
  
  
  Use Conversion Factors: If the production process requires different units of measure, ensure that appropriate conversion factors are defined in the material master. This will help SAP to handle the conversion automatically without generating errors.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on handling units of measure in production orders.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on handling units of measure.
  Transaction Codes: Familiarize yourself with transaction codes such as MM02 (Change Material), CO01 (Create Production Order), and CO02 (Change Production Order) to review and modify material and order settings.
  User Exits and BAdIs: If the issue persists, consider exploring user exits or Business Add-Ins (BAdIs) that may allow for custom handling of unit conversions in your specific business context.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it. If the problem continues, it may be beneficial to engage with SAP support or a consultant who specializes in SAP production planning.