How To Fix BM309 - Choose a unit that matches the dimension

SAP Error Message - Details

• Message type: E = Error

• Message class: BM - Development class BZME - units of measure

• Message number: 309

• Message text: Choose a unit that matches the dimension

What causes this issue?

In the units of measure table, dimension &V2& is not entered for unit
of measure &V1&.

System Response

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

How to fix this error?

To display a list of possible values, select F4.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message BM309 - Choose a unit that matches the dimension ?

  The SAP error message BM309 ("Choose a unit that matches the dimension") typically occurs in the context of material management or inventory management when there is a mismatch between the unit of measure (UoM) selected and the dimensions of the material being processed. This error can arise in various transactions, such as when creating or changing material master records, or during inventory postings.
  Cause:
  
  Unit of Measure Mismatch: The selected unit of measure does not correspond to the dimensions defined for the material. For example, if a material is defined in cubic meters, but the user tries to enter a unit of measure in liters, this error will occur.
  Incorrect Configuration: The material master may not be configured correctly, leading to inconsistencies in the units of measure and their dimensions.
  Missing Conversion Factors: If the conversion factors between different units of measure are not defined properly, it can lead to this error.
  
  Solution:
  
  
  Check Material Master Data:
  
  Go to the material master record (transaction code MM02 or MM03).
  Verify the units of measure defined for the material and ensure they are appropriate for the dimensions.
  Ensure that the base unit of measure is correctly set.
  
  
  
  Review Unit of Measure Settings:
  
  Check the configuration of units of measure in the system (transaction code OME1).
  Ensure that the units of measure are correctly defined and that conversion factors are set up properly.
  
  
  
  Use Compatible Units:
  
  When entering data, ensure that the unit of measure you are selecting is compatible with the dimensions of the material. For example, if the material is measured in kilograms, do not select a unit that is incompatible, like pieces or liters.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help files for specific guidelines on units of measure and dimensions for the materials you are working with.
  
  
  
  Seek Help from SAP Support:
  
  If the issue persists, consider reaching out to your SAP support team or consulting SAP Notes for any known issues or patches related to this error.
  
  
  
  Related Information:
  
  Transaction Codes: MM01 (Create Material), MM02 (Change Material), MM03 (Display Material), OME1 (Maintain Units of Measure).
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  User Training: Ensure that users are trained on how to select appropriate units of measure and understand the implications of unit conversions in SAP.
  
  By following these steps, you should be able to resolve the BM309 error and ensure that the units of measure used in your SAP transactions are consistent with the material dimensions.