How To Fix MDC_MODEL066 - Configured key mapping &1 field not in process table &2

SAP Error Message - Details

• Message type: E = Error

• Message class: MDC_MODEL - Messages In Context Of MDC Model

• Message number: 066

• Message text: Configured key mapping &1 field not in process table &2

Self-Explanatory Message

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To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message MDC_MODEL066 - Configured key mapping &1 field not in process table &2 ?

  The SAP error message MDC_MODEL066 indicates that there is a problem with the key mapping configuration in the context of a model-driven application. Specifically, it suggests that a field that has been configured as a key mapping is not present in the specified process table. This can occur in various scenarios, particularly when working with SAP S/4HANA or SAP Business Technology Platform applications.
  Cause:
  
  Field Not Present: The field specified in the key mapping configuration does not exist in the process table defined in the model.
  Incorrect Configuration: There may be a misconfiguration in the model or the mapping settings, leading to a mismatch between the expected fields and the actual fields in the database.
  Changes in Data Model: If the underlying data model has changed (e.g., fields were added or removed), the key mapping may no longer be valid.
  Transport Issues: If the configuration was transported from one system to another, there may be inconsistencies in the data model between the source and target systems.
  
  Solution:
  
  Verify Field Existence: Check the process table specified in the error message to ensure that the field mentioned in the key mapping actually exists. You can do this by examining the database table or the data model in the SAP system.
  Update Key Mapping: If the field does not exist, you may need to update the key mapping configuration to point to a valid field that exists in the process table.
  Check Configuration: Review the configuration settings in the model to ensure that all mappings are correctly defined and that there are no typos or incorrect references.
  Adjust Data Model: If the data model has changed, you may need to adjust the key mapping to align with the new structure of the process table.
  Transport Validation: If the issue arose after a transport, validate that all necessary objects and configurations were transported correctly and that there are no discrepancies between the systems.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions for common problems.
  Documentation: Refer to the official SAP documentation for model-driven applications and key mapping configurations to ensure compliance with best practices.
  Community Forums: Engage with the SAP Community or forums where other users may have encountered similar issues and can provide insights or solutions.
  
  If the problem persists after following these steps, consider reaching out to SAP support for further assistance.