How To Fix CNV789 - Wrong routine type for aggregate routine &3 (field &2 of table &1)

CNV789 - Overview

• Message type: E = Error

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

• Message number: 789

• Message text: Wrong routine type for aggregate routine &3 (field &2 of table &1)

What causes this issue?

Aggregate routines must be of type 'F' (form routines). The routine &V3&
provided for field &V2& of table &V1& has another type.

System Response

Status is set to 'Error'.

How to fix this error?

Provide a form routine to aggregate field &V2& of table &V1& or choose
another duplicate handling type.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

CNV789 - Details

• The SAP error message CNV789 indicates that there is a problem with the routine type specified for an aggregate routine in a data conversion or migration process. This error typically occurs during the execution of a data migration project, particularly when using the SAP Data Migration Workbench or similar tools.
  
  Cause:
  The error message "Wrong routine type for aggregate routine &3 (field &2 of table &1)" suggests that:
  
  The routine type defined for the aggregate routine does not match the expected type for the specified field in the specified table.
  There may be a mismatch between the data types or the expected structure of the data being processed.
  The aggregate routine may not be properly defined or configured in the system.
  
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Routine Definition:
  
  Verify the definition of the aggregate routine in the system. Ensure that the routine type is correctly specified and matches the expected type for