How To Fix MDC_MAT_MODEL105 - Key Mapping error occured

SAP Error Message - Details

• Message type: E = Error

• Message class: MDC_MAT_MODEL -

• Message number: 105

• Message text: Key Mapping error occured

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MDC_MAT_MODEL105 - Key Mapping error occured ?

  The SAP error message MDC_MAT_MODEL105, which indicates a "Key Mapping error occurred," typically arises in the context of SAP S/4HANA, particularly when dealing with the Master Data Governance (MDG) or Material Management (MM) modules. This error usually occurs when there is an issue with the mapping of keys between different systems or data models, especially during data replication or integration processes.
  Causes:
  
  
  Inconsistent Key Mapping: The error may occur if there are inconsistencies in the key mapping between the source and target systems. This can happen if the keys (like material numbers) do not match or are not properly defined in the system.
  
  
  Missing Data: If the required data for the key mapping is missing or incomplete, it can lead to this error.
  
  
  Configuration Issues: Incorrect configuration in the system settings related to key mapping or data replication can also trigger this error.
  
  
  Data Model Changes: Changes in the data model or structure that have not been properly reflected in the key mapping configuration can lead to this issue.
  
  
  Transport Issues: If there are issues with the transport of data or configuration settings between different environments (e.g., development to production), it can cause key mapping errors.
  
  
  Solutions:
  
  
  Check Key Mapping Configuration: Review the key mapping configuration in the system to ensure that all keys are correctly defined and mapped. This includes checking the settings in the relevant customizing transactions.
  
  
  Validate Data: Ensure that the data being processed is complete and that all required fields are populated. This may involve checking the source data for any missing or incorrect entries.
  
  
  Review Change Logs: If there have been recent changes to the data model or configuration, review the change logs to identify any modifications that may have affected key mapping.
  
  
  Reconfigure Data Replication: If the error occurs during data replication, consider reconfiguring the data replication settings to ensure that they align with the current data model.
  
  
  Consult Documentation: Refer to SAP documentation or notes related to the specific error message for additional troubleshooting steps or patches that may address the issue.
  
  
  Engage SAP Support: If the issue persists after trying the above solutions, consider reaching out to SAP support for further assistance. They can provide insights based on the specific context of your system and configuration.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide guidance on key mapping issues.
  Transaction Codes: Familiarize yourself with transaction codes related to material master data and key mapping, such as MM01 (Create Material), MM02 (Change Material), and MDG-related transactions.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to diagnose and resolve the MDC_MAT_MODEL105 key mapping error in your SAP system.