How To Fix M3336 - Unit of measure & used as alternative unit

SAP Error Message - Details

• Message type: E = Error

• Message class: M3 - Material Master

• Message number: 336

• Message text: Unit of measure & used as alternative unit

What causes this issue?

You have changed the base unit of measure to a unit that is already
used as an alternative unit of measure.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message M3336 - Unit of measure & used as alternative unit ?

  The SAP error message M3336 indicates that there is an issue with the unit of measure (UoM) being used in a transaction. Specifically, it states that the unit of measure is being used as an alternative unit but is not defined correctly in the system. This can occur in various scenarios, such as when creating or modifying material master records, purchase orders, or sales orders.
  Cause:
  
  Incorrect Configuration: The unit of measure may not be properly configured in the material master record. This can happen if the alternative unit of measure is not defined or if there is a mismatch between the base unit of measure and the alternative unit.
  Missing Data: The alternative unit of measure may not be assigned to the material in the material master.
  Inconsistent Data: There may be inconsistencies in the data related to the unit of measure, such as incorrect conversion factors or missing entries in the unit of measure table.
  
  Solution:
  
  
  Check Material Master: 
  
  Go to the material master record (transaction code MM03) and check the "Basic Data" and "Purchasing" views.
  Ensure that the alternative unit of measure is defined correctly and that it is linked to the base unit of measure.
  
  
  
  Define Alternative Units of Measure:
  
  If the alternative unit of measure is not defined, you can add it in the material master by going to the "Basic Data" view and entering the alternative unit of measure along with the conversion factor.
  
  
  
  Review Unit of Measure Settings:
  
  Check the configuration settings for units of measure in the SAP system (transaction code OME1 for defining units of measure).
  Ensure that the conversion factors between the base unit and alternative units are correctly set up.
  
  
  
  Check for Inconsistencies:
  
  Use transaction code MM02 to modify the material master and ensure that all relevant fields are filled out correctly.
  Verify that there are no inconsistencies in the data related to the unit of measure.
  
  
  
  Consult Documentation: 
  
  If the issue persists, consult SAP documentation or reach out to your SAP support team for further assistance.
  
  
  
  Related Information:
  
  Unit of Measure (UoM): In SAP, a unit of measure is a standard quantity used to measure the amount of a material. It can be a base unit (e.g., pieces, kilograms) or an alternative unit (e.g., boxes, pallets).
  Material Master: The material master is a central repository of information about materials in SAP, including data related to purchasing, sales, and inventory management.
  Conversion Factors: These are used to convert between different units of measure. For example, if the base unit is "kg" and the alternative unit is "g", the conversion factor would be 1000 (1 kg = 1000 g).
  
  By following these steps, you should be able to resolve the M3336 error and ensure that the unit of measure is correctly configured in your SAP system.