How To Fix CNV796 - Incorrect aggregation function value for the field &1 of table &2

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV - Conversion: Messages for Conversion Services (CNCC)

• Message number: 796

• Message text: Incorrect aggregation function value for the field &1 of table &2

What causes this issue?

Either no aggregate function has been defined for the field &V1& of the
table &V2&, or the type of this function is incorrect. Only the form
routines are allowed here.

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?

Correct the corresponding entry in the table CNVFIELDS.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV796 - Incorrect aggregation function value for the field &1 of table &2 ?

  The SAP error message CNV796 "Incorrect aggregation function value for the field &1 of table &2" typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that there is an issue with the aggregation function specified for a particular field in a table during the data transformation process.
  Cause:
  
  Invalid Aggregation Function: The aggregation function specified for the field is not valid or not supported for that particular field or table.
  Data Type Mismatch: The data type of the field may not be compatible with the specified aggregation function.
  Configuration Issues: There may be configuration issues in the migration settings or mapping that lead to incorrect aggregation function assignments.
  Custom Fields: If the field is a custom field, it may not have been properly defined in the migration settings.
  
  Solution:
  
  Check Aggregation Function: Review the aggregation function specified for the field in the migration settings. Ensure that it is valid for the data type and context of the field.
  Review Data Mapping: Go through the data mapping configuration to ensure that the correct aggregation functions are assigned to the appropriate fields.
  Consult Documentation: Refer to SAP documentation or migration guides for the specific version you are using to understand the valid aggregation functions for the fields in question.
  Adjust Data Types: If there is a data type mismatch, consider adjusting the data types in the source data or modifying the aggregation function to match the expected data type.
  Test with Sample Data: If possible, test the migration with a smaller set of sample data to isolate the issue and verify that the aggregation functions work as expected.
  Seek Support: If the issue persists, consider reaching out to SAP support or consulting with an SAP expert who can provide guidance based on the specific context of your migration.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address known issues or provide additional guidance on this error.
  Migration Cockpit Documentation: Review the official SAP documentation for the Migration Cockpit, which may provide insights into common errors and their resolutions.
  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 identify the root cause of the CNV796 error and implement an appropriate solution.