How To Fix MDM_CLF_LEAN255 - Class &1 (class type &2) has default data for base unit of measure

SAP Error Message - Details

• Message type: E = Error

• Message class: MDM_CLF_LEAN - MDM Lean Classification - Reuse Parts

• Message number: 255

• Message text: Class &1 (class type &2) has default data for base unit of measure

What causes this issue?

You have used a class that has a value defined for Base Unit of Measure
under <ZK>Default data for BOM component</> on the <ZK>Addnl data</>
(Additional Data) tab.
Such classes are not supported in MDG.

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?

If you don?t need this default value, remove it so that you can use the
class.
If you want to keep this default value contact your system
administrator.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MDM_CLF_LEAN255 - Class &1 (class type &2) has default data for base unit of measure ?

  The SAP error message MDM_CLF_LEAN255 indicates that there is an issue with the default data for the base unit of measure in a specific class and class type. This error typically arises in the context of Material Master Data Management (MDM) or when dealing with classification in SAP.
  Cause:
  The error occurs when:
  
  A class (identified by &1) of a certain class type (identified by &2) is missing the necessary default data for the base unit of measure.
  The system expects that every class should have a defined base unit of measure, but it is either not set or incorrectly configured.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Check Class Configuration:
  
  Go to the transaction code CL02 (Change Class) or CL03 (Display Class).
  Enter the class name and class type to check the configuration.
  Ensure that the class has a valid base unit of measure defined.
  
  
  
  Define Base Unit of Measure:
  
  If the base unit of measure is missing, you need to define it.
  Navigate to the relevant class and add the base unit of measure in the class attributes.
  
  
  
  Check Material Master Data:
  
  If the class is linked to material master data, ensure that the material master records are correctly set up with the appropriate units of measure.
  Use transaction code MM02 to modify the material master data if necessary.
  
  
  
  Review Classification Data:
  
  Ensure that the classification data for the materials assigned to the class is complete and correct.
  Check if the materials are correctly assigned to the class and that all required attributes are filled out.
  
  
  
  Transport Requests:
  
  If changes were made in a development environment, ensure that they are transported to the production environment correctly.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help resources for any specific guidelines related to class and unit of measure configuration.
  
  
  
  Related Information:
  
  Transaction Codes:
  
  CL02: Change Class
  CL03: Display Class
  MM02: Change Material Master
  
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional guidance.
  User Roles: Ensure that you have the necessary authorizations to make changes to class and material master data.
  
  By following these steps, you should be able to identify and resolve the issue causing the MDM_CLF_LEAN255 error in SAP.