How To Fix BM301 - System error: Field for unit does not have three or six characters

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 301

• Message text: System error: Field for unit does not have three or six characters

What causes this issue?

The name for the external unit of measure is not defined in table T006B
or T006C in the specified language.

How to fix this error?

INCLUDE NA_SYSADMIN1

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message BM301 - System error: Field for unit does not have three or six characters ?

  The SAP error message BM301 indicates that there is an issue with the unit of measure (UoM) field in your transaction or data entry. Specifically, the error states that the field for the unit does not have the required length of either three or six characters. This is a common issue when dealing with units of measure in SAP, especially in modules like Materials Management (MM) or Sales and Distribution (SD).
  Cause:
  
  Incorrect Unit of Measure: The unit of measure being used is either too short (less than three characters) or too long (more than six characters).
  Configuration Issues: The unit of measure may not be properly configured in the system, or the settings for the unit of measure may not align with the expected formats.
  Data Entry Error: A user may have mistakenly entered an incorrect value in the unit of measure field.
  
  Solution:
  
  
  Check the Unit of Measure: Verify that the unit of measure you are trying to use is correctly defined in the system. It should be either three or six characters long.
  
  You can check this in the SAP transaction code CUNI (Unit of Measure Conversion) or OMN1 (Define Units of Measure).
  
  
  
  Correct the Entry: If you are entering the unit of measure manually, ensure that it meets the character length requirement. For example, use "KG" for kilograms (which is valid) instead of "K" (which is invalid).
  
  
  Review Configuration: If you are an administrator or have access to configuration settings, review the settings for units of measure in the relevant modules to ensure they are set up correctly.
  
  
  Consult Documentation: If you are unsure about the correct units of measure to use, refer to your organization's documentation or SAP help resources for guidance.
  
  
  Contact Support: If the issue persists after checking the above points, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CUNI for unit of measure settings and MM01 for material master data maintenance.
  SAP Notes: Check SAP Notes for any known issues or patches related to unit of measure handling in your specific version of SAP.
  User Training: Ensure that users are trained on the correct formats for entering units of measure to prevent future occurrences of this error.
  
  By following these steps, you should be able to resolve the BM301 error and ensure that your unit of measure entries are valid.