How To Fix COM_DIFF_KEY102 - Key type & is already using the proxy parameter &

SAP Error Message - Details

• Message type: E = Error

• Message class: COM_DIFF_KEY - Messages for Differentiation Key

• Message number: 102

• Message text: Key type & is already using the proxy parameter &

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message COM_DIFF_KEY102 - Key type & is already using the proxy parameter & ?

  The SAP error message COM_DIFF_KEY102 indicates that there is a conflict with the key type being used in a particular context, specifically that the key type is already in use with the specified proxy parameter. This error typically arises in the context of SAP's Composite Application Framework (CAF) or when dealing with service interfaces and proxies.
  Cause:
  
  Duplicate Key Usage: The error usually occurs when there is an attempt to use a key type that is already associated with another proxy parameter. This can happen if the same key type is defined multiple times in the same context or if there is a misconfiguration in the service definition.
  Incorrect Configuration: The configuration of the service or the proxy might not align with the expected definitions, leading to conflicts.
  Modeling Issues: If you are working with composite applications, there might be issues in the way the data model is defined, particularly with respect to key types and their associations.
  
  Solution:
  
  Check Key Type Definitions: Review the definitions of the key types in your service or proxy configuration. Ensure that each key type is uniquely defined and not reused inappropriately.
  Modify Proxy Parameters: If a key type is already in use, consider modifying the proxy parameters to use a different key type or to remove the conflicting usage.
  Review Service Interfaces: Check the service interfaces and ensure that they are correctly configured. Look for any duplicate entries or misconfigurations that could lead to this error.
  Rebuild or Redeploy: If changes are made, it may be necessary to rebuild or redeploy the affected components to ensure that the changes take effect.
  Consult Documentation: Refer to SAP documentation or notes related to the specific version you are using, as there may be known issues or additional guidance available.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific fixes or patches related to this error message. SAP frequently updates their knowledge base with solutions to common issues.
  Community Forums: Engage with SAP community forums or support channels where other users may have encountered similar issues and can provide insights or solutions.
  Debugging: If you have access to debugging tools, consider tracing the execution to identify where the conflict arises in the code or configuration.
  
  By following these steps, you should be able to identify the root cause of the COM_DIFF_KEY102 error and implement a solution to resolve it.