How To Fix W+307 - Unit of measure & is not known

SAP Error Message - Details

• Message type: E = Error

• Message class: W+ -

• Message number: 307

• Message text: Unit of measure & is not known

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message W+307 - Unit of measure & is not known ?

  The SAP error message W+307 "Unit of measure & is not known" typically occurs when the system encounters a unit of measure (UoM) that is not defined or recognized in the system. This can happen in various scenarios, such as during the creation of a material, when entering data in a transaction, or while processing inventory movements.
  Cause:
  
  Undefined Unit of Measure: The unit of measure you are trying to use has not been defined in the system.
  Incorrect Configuration: The unit of measure may not be properly configured in the relevant master data (e.g., material master).
  Data Entry Error: There may be a typo or error in the unit of measure being entered.
  Missing Conversion Factors: If the unit of measure is defined but lacks conversion factors to the base unit, it may not be recognized.
  
  Solution:
  
  
  Check Unit of Measure Definition:
  
  Go to the transaction code CUNI (Unit of Measure Conversion) or OMN1 (Define Units of Measure) to check if the unit of measure is defined.
  If it is not defined, you will need to create it.
  
  
  
  Create or Modify Unit of Measure:
  
  If the unit of measure is missing, you can create it by entering the necessary details such as the unit of measure code, description, and any conversion factors.
  Ensure that the unit of measure is assigned to the appropriate measurement category (e.g., weight, volume).
  
  
  
  Check Material Master:
  
  If the error occurs while working with a specific material, check the material master data using transaction code MM03 (Display Material).
  Ensure that the unit of measure is correctly assigned in the Basic Data and Purchasing views.
  
  
  
  Review Transaction Data:
  
  If the error occurs during a transaction, double-check the data entry for any typos or incorrect units.
  
  
  
  Consult Documentation:
  
  If you are unsure about the correct unit of measure to use, refer to your organization's documentation or consult with a colleague who is knowledgeable about the specific materials or processes.
  
  
  
  Related Information:
  
  Unit of Measure Types: SAP supports various types of units of measure, including base units, alternative units, and sales units. Understanding these can help in configuring the system correctly.
  Conversion Factors: If you are using multiple units of measure for a material, ensure that conversion factors are set up correctly to avoid discrepancies.
  User Authorizations: Ensure that you have the necessary authorizations to create or modify units of measure in the system.
  
  By following these steps, you should be able to resolve the W+307 error and ensure that the unit of measure is recognized in your SAP system.