How To Fix KS311 - Unit of measure &1 cannot be converted to &2

SAP Error Message - Details

• Message type: E = Error

• Message class: KS - RK-S Master Data Maintenance

• Message number: 311

• Message text: Unit of measure &1 cannot be converted to &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message KS311 - Unit of measure &1 cannot be converted to &2 ?

  The SAP error message KS311, which states "Unit of measure &1 cannot be converted to &2," typically occurs in the context of cost center accounting or when dealing with quantities in different units of measure. This error indicates that there is an issue with converting one unit of measure (UoM) to another, which can happen in various scenarios, such as during the posting of costs or when processing transactions that involve different units of measure.
  Causes:
  
  
  Incompatible Units of Measure: The two units of measure involved may not be compatible for conversion. For example, trying to convert a weight measurement (like kilograms) to a volume measurement (like liters) without a defined conversion factor.
  
  
  Missing Conversion Factors: The conversion factors between the two units of measure may not be defined in the system. SAP requires that a conversion factor exists for any unit of measure conversion.
  
  
  Incorrect Master Data: The master data for materials, cost centers, or other relevant entities may have incorrect or incomplete unit of measure settings.
  
  
  Configuration Issues: There may be configuration issues in the SAP system related to units of measure, such as missing settings in the relevant customizing tables.
  
  
  Solutions:
  
  
  Check Unit of Measure Settings: Verify the unit of measure settings in the material master or relevant master data. Ensure that the units of measure involved in the transaction are correctly defined and compatible.
  
  
  Define Conversion Factors: If the conversion factor between the two units of measure is missing, you can define it in the SAP system. This can typically be done in the material master under the "Units of Measure" view.
  
  
  Review Master Data: Check the master data for the materials or cost centers involved in the transaction. Ensure that the units of measure are correctly assigned and that there are no discrepancies.
  
  
  Consult Configuration: If you have access to the configuration settings, check the relevant customizing tables (like T006 for units of measure) to ensure that the necessary settings are in place.
  
  
  Use Compatible Units: If possible, use compatible units of measure in your transactions to avoid conversion issues.
  
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like MM02 (Change Material) to check and update material master data, or KS01 (Create Cost Center) to review cost center settings.
  SAP Notes: Check SAP Notes for any known issues or patches related to unit of measure conversions.
  Documentation: Refer to SAP documentation for detailed information on units of measure and their configuration.
  
  If the issue persists after checking these areas, it may be beneficial to consult with your SAP support team or a functional consultant who specializes in the relevant module.