How To Fix CM_MDG_BS_CLF_GEN029 - Class type &1 excluded; class type does not support change number

SAP Error Message - Details

• Message type: E = Error

• Message class: CM_MDG_BS_CLF_GEN - Classification Message Class

• Message number: 029

• Message text: Class type &1 excluded; class type does not support change number

What causes this issue?

You entered a change number, but class assignment or valuation for this
class type is not allowed to be changed with a change number. See
customizing for material class types.

System Response

The class type is excluded from display and maintenance.

How to fix this error?

To display or maintain this classtype leave the transaction and open
classification again without entering a change number.

Procedure for System Administrators

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 CM_MDG_BS_CLF_GEN029 - Class type &1 excluded; class type does not support change number ?

  The SAP error message CM_MDG_BS_CLF_GEN029 indicates that a specific class type is excluded from using change numbers in the context of Master Data Governance (MDG). This typically occurs when you are trying to create or modify a class instance that is associated with a class type that does not support change numbers.
  Cause:
  
  Class Type Configuration: The class type you are working with is configured in such a way that it does not support change numbers. This is often a result of settings in the class type configuration in the SAP system.
  Change Number Settings: The change number functionality may not be enabled for the specific class type in the system settings.
  MDG Configuration: The Master Data Governance configuration may not allow change numbers for certain types of master data.
  
  Solution:
  
  
  Check Class Type Configuration:
  
  Go to transaction CL02 (Change Class) or CL03 (Display Class) and check the configuration of the class type in question.
  Ensure that the class type is set up to support change numbers. You may need to consult with your SAP Basis or configuration team to adjust the settings.
  
  
  
  Enable Change Number:
  
  If the class type should support change numbers, you may need to enable this feature in the class type settings. This can usually be done in the class type configuration under the "Change Number" settings.
  
  
  
  Review MDG Settings:
  
  Check the MDG configuration to ensure that the relevant settings allow for change numbers for the specific type of master data you are working with. This may involve reviewing the data model and the associated configuration.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or notes related to the specific class type and change number functionality to ensure compliance with best practices.
  
  
  
  Testing:
  
  After making any changes, perform tests to ensure that the error no longer occurs and that the change number functionality works as expected.
  
  
  
  Related Information:
  
  
  Transaction Codes: 
  
  CL02: Change Class
  CL03: Display Class
  SPRO: Access to the configuration settings for MDG and class types.
  
  
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or updates regarding this error message.
  
  
  SAP Community: Engage with the SAP Community forums for discussions related to similar issues, as other users may have encountered and resolved the same error.
  
  
  If the issue persists after following these steps, it may be beneficial to reach out to SAP support for further assistance.