How To Fix MM365 - Key fields for use data &1 and checkbox structure &2 are different

SAP Error Message - Details

• Message type: E = Error

• Message class: MM - Messages for material master maintenance and Customizing

• Message number: 365

• Message text: Key fields for use data &1 and checkbox structure &2 are different

What causes this issue?

The key fields in use data structure &V1& and checkbox structure &V2&
are different for material &V3&.

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?

Check the entries in the key fields of use data structure &V1& and
checkbox structure &V2& for material &V3&.
Perhaps a key field is blank, or the values in &V1& and
&V2& do not match.

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 MM365 - Key fields for use data &1 and checkbox structure &2 are different ?

  The SAP error message MM365, which states "Key fields for use data &1 and checkbox structure &2 are different," typically occurs in the context of Material Management (MM) when there is a mismatch between the key fields defined in the use data and the checkbox structure in a particular configuration or transaction.
  Cause:
  
  
  Mismatch in Key Fields: The error is primarily caused by a discrepancy between the key fields defined in the use data (like a material master record) and those defined in the checkbox structure (like a configuration or selection screen). This can happen if the structures are not aligned or if there have been changes in the data model that have not been reflected in the configuration.
  
  
  Configuration Issues: If the checkbox structure is not properly configured to match the key fields of the use data, this error can occur. This might happen after a system upgrade, changes in the data model, or incorrect customizations.
  
  
  Data Integrity Issues: Sometimes, data integrity issues can lead to this error, especially if there are inconsistencies in the database or if the data has been manually altered.
  
  
  Solution:
  
  
  Check Configuration: Review the configuration settings for the use data and the checkbox structure. Ensure that the key fields are consistent and correctly defined in both places.
  
  
  Adjust Key Fields: If there are discrepancies, you may need to adjust the key fields in either the use data or the checkbox structure to ensure they match. This may involve working with your SAP configuration team or using transaction codes like SPRO to access the relevant configuration settings.
  
  
  Data Consistency Check: Perform a data consistency check to ensure that there are no underlying data issues. This can involve running reports or using transaction codes that help identify inconsistencies in the material master or related data.
  
  
  Consult Documentation: Refer to SAP documentation or notes related to this error message. SAP Notes may provide specific guidance or patches that address known issues related to this error.
  
  
  Testing: After making changes, conduct thorough testing to ensure that the error is resolved and that the system behaves as expected.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error. SAP frequently updates its knowledge base with solutions for common issues.
  Transaction Codes: Familiarize yourself with transaction codes like MM01 (Create Material), MM02 (Change Material), and MM03 (Display Material) to see how the data is structured.
  Support: If the issue persists, consider reaching out to SAP support or your internal SAP support team for further assistance.
  
  By following these steps, you should be able to identify the cause of the MM365 error and implement a solution to resolve it.