How To Fix OIUME037 - You must enter a default UoM if changes to Uom are not allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: OIUME - Measurement messages

• Message number: 037

• Message text: You must enter a default UoM if changes to Uom are not allowed

What causes this issue?

If the characteristics of a reading type are such that the unit of
measure may not be changed, you must enter a default unit of measure.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message OIUME037 - You must enter a default UoM if changes to Uom are not allowed ?

  The SAP error message OIUME037 indicates that a default Unit of Measure (UoM) must be specified when changes to the UoM are not allowed. This typically occurs in the context of material master data management, particularly when dealing with the Units of Measure for materials in SAP.
  Cause:
  The error arises when:
  
  You are trying to change the UoM for a material, but the system settings or configuration do not allow for such changes.
  The material master record does not have a default UoM defined, which is required for the system to process transactions involving that material.
  The material is set up in a way that restricts changes to the UoM, such as being part of a specific valuation class or having certain status settings.
  
  Solution:
  To resolve the OIUME037 error, you can take the following steps:
  
  
  Define a Default UoM:
  
  Go to the material master record (transaction code MM02).
  Navigate to the "Basic Data" or "Purchasing" views, depending on where you need to set the UoM.
  Ensure that a default UoM is specified in the relevant field.
  
  
  
  Check Material Type Settings:
  
  Review the material type settings in the configuration (transaction code SPRO).
  Ensure that the material type allows for the definition of a default UoM and that it is not restricted from changing UoMs.
  
  
  
  Review UoM Group:
  
  Check the UoM group assigned to the material. Ensure that it includes the necessary UoMs and that a default UoM is specified.
  
  
  
  Consult with Configuration Team:
  
  If you are unsure about the settings or if the issue persists, consult with your SAP configuration team or a functional consultant who can help you review the settings and make necessary adjustments.
  
  
  
  Transaction Restrictions:
  
  If the material is part of a transaction that restricts UoM changes (like a purchase order or sales order), you may need to resolve those transactions first before making changes to the UoM.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  MM01: Create Material
  MM02: Change Material
  MM03: Display Material
  SPRO: Access to SAP Customizing Implementation Guide
  
  
  
  Documentation:
  
  SAP Help Portal and SAP Notes can provide additional insights and troubleshooting steps related to material master data and UoM settings.
  
  
  
  User Roles:
  
  Ensure that you have the necessary authorizations to make changes to the material master data.
  
  
  
  By following these steps, you should be able to resolve the OIUME037 error and successfully manage the UoM settings for your materials in SAP.