How To Fix CNV_PE178 - Parameter &1 is a structure; structure parameters are not allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_PE - General messages for posting engine

• Message number: 178

• Message text: Parameter &1 is a structure; structure parameters are not allowed

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_PE178 - Parameter &1 is a structure; structure parameters are not allowed ?

  The SAP error message CNV_PE178 indicates that a parameter being used in a conversion or migration process is a structure, and structures cannot be used as parameters in the context where they are being referenced. This error typically arises during data migration or conversion activities, particularly when using the SAP Landscape Transformation (SLT) or other data migration tools.
  Cause:
  
  Incorrect Parameter Type: The error occurs when a structure is passed as a parameter to a function or method that expects a simple data type (like a single value or a scalar type).
  Configuration Issues: There may be a misconfiguration in the data migration settings or mapping definitions where a structure was incorrectly defined or referenced.
  Coding Errors: If custom code is involved in the migration process, there may be a coding error where a structure is being passed instead of its individual fields.
  
  Solution:
  
  Check Parameter Definitions: Review the parameters being passed in the function or method call. Ensure that only simple data types are being used and that structures are not being passed directly.
  Modify Mapping: If you are using a mapping tool, check the mapping definitions to ensure that structures are not being incorrectly referenced. You may need to break down the structure into its individual components.
  Review Custom Code: If there is custom code involved, review it to ensure that it adheres to the expected parameter types. You may need to extract individual fields from the structure and pass them as separate parameters.
  Consult Documentation: Refer to the SAP documentation for the specific migration tool or function module you are using to understand the expected parameter types and structures.
  Testing: After making changes, conduct thorough testing to ensure that the error is resolved and that the migration process works as intended.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on handling structures in migration processes.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Debugging: If you have access to debugging tools, consider using them to trace the execution flow and identify where the structure is being incorrectly passed.
  
  By addressing the root cause of the error and ensuring that only appropriate parameter types are used, you should be able to resolve the CNV_PE178 error effectively.