How To Fix 31014 - Unit of measurement &: conversion ISO to SAP not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: 31 - Message Processing: IDoc Service Master Record

• Message number: 014

• Message text: Unit of measurement &: conversion ISO to SAP not possible

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message 31014 - Unit of measurement &: conversion ISO to SAP not possible ?

  The SAP error message 31014, which states "Unit of measurement &: conversion ISO to SAP not possible," typically occurs when there is an issue with the unit of measurement (UoM) conversion between ISO standards and SAP's internal UoM definitions. This can happen in various scenarios, such as during the creation of materials, when processing transactions, or when performing data uploads.
  Causes:
  
  Missing UoM Definition: The unit of measurement you are trying to use may not be defined in the SAP system.
  Incorrect UoM Conversion: There may be no valid conversion factor defined between the ISO unit and the SAP unit.
  Inconsistent UoM Settings: The settings for the UoM in the material master or other relevant configurations may not be consistent.
  Data Upload Issues: If you are uploading data (e.g., via LSMW or other tools), the UoM might not be correctly mapped.
  
  Solutions:
  
  
  Check UoM Definitions:
  
  Go to transaction code CUNI (Unit of Measure Conversion) to check if the UoM is defined in the system.
  Ensure that the UoM you are trying to use is available and correctly configured.
  
  
  
  Define Conversion Factors:
  
  If the UoM exists but lacks a conversion factor, you can define the conversion between the ISO unit and the SAP unit in the same transaction (CUNI).
  Make sure to specify the correct conversion factors.
  
  
  
  Review Material Master Data:
  
  Check the material master data (transaction code MM03) to ensure that the UoM settings are correct.
  Verify that the base unit of measure and alternative units of measure are properly defined.
  
  
  
  Check Configuration Settings:
  
  Review the configuration settings in the SAP system related to units of measure. This can be done in the SPRO transaction under Logistics General > Material Master > Basic Settings > Units of Measure.
  
  
  
  Data Upload Mapping:
  
  If the error occurs during a data upload, ensure that the mapping of UoMs in your upload template is correct and matches the definitions in SAP.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for specific details on UoM handling and conversion.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  CUNI: Unit of Measure Conversion
  MM03: Display Material
  SPRO: Customizing Implementation Guide
  
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to UoM handling.
  
  
  User Forums: Consider visiting SAP community forums or support sites for additional insights and user experiences related to this error.
  
  
  By following these steps, you should be able to identify and resolve the issue causing the error message 31014 in SAP.