How To Fix MY203 - Unit of measure & not allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: MY - Messages for Balance Sheet Valuation(Low.Val.Det./LIFO/FIFO)

• Message number: 203

• Message text: Unit of measure & not allowed

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 MY203 - Unit of measure & not allowed ?

  The SAP error message MY203, which states "Unit of measure & not allowed," typically occurs when there is an issue with the unit of measure (UoM) being used in a transaction or master data record. This error can arise in various contexts, such as during the creation of purchase orders, sales orders, or inventory management.
  Causes of MY203 Error
  
  Incorrect Unit of Measure: The unit of measure being used is not defined or allowed for the material or transaction type in question.
  Missing UoM Conversion: If the unit of measure is not properly converted or if there is no conversion factor defined between the base unit and the unit being used.
  Material Master Settings: The unit of measure settings in the material master may not include the unit being used.
  Configuration Issues: There may be configuration settings in the system that restrict the use of certain units of measure for specific materials or transactions.
  Transaction Type Restrictions: Certain transaction types may have restrictions on which units of measure can be used.
  
  Solutions to MY203 Error
  
  
  Check Material Master Data:
  
  Go to the material master record (transaction code MM03) and verify the units of measure defined for the material. Ensure that the unit you are trying to use is listed in the "Units of Measure" view.
  
  
  
  Review UoM Conversions:
  
  Ensure that there are appropriate conversion factors defined between the base unit of measure and the unit you are trying to use. This can be checked in the material master under the "Units of Measure" section.
  
  
  
  Adjust Configuration Settings:
  
  If you have access to configuration settings, check the settings in the relevant customizing transactions (e.g., SPRO) to ensure that the unit of measure is allowed for the specific transaction or material type.
  
  
  
  Use Allowed Units of Measure:
  
  If the unit of measure is not allowed, consider using an alternative unit that is permitted for the transaction or material.
  
  
  
  Consult Documentation or Support:
  
  If the issue persists, consult SAP documentation or reach out to your SAP support team for further assistance. They may provide insights specific to your system configuration.
  
  
  
  Related Information
  
  
  Transaction Codes: 
  
  MM03 (Display Material Master)
  MM02 (Change Material Master)
  ME21N (Create Purchase Order)
  VA01 (Create Sales Order)
  
  
  
  SAP Notes: 
  
  Check SAP Notes for any known issues or patches related to the MY203 error message.
  
  
  
  User Roles and Authorizations: 
  
  Ensure that the user has the necessary authorizations to perform the transaction involving the unit of measure.
  
  
  
  By following these steps, you should be able to identify the cause of the MY203 error and implement a solution to resolve it.