How To Fix CNV_00001109 - Custom aggregate routine not defined for field &2 of table &1

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_00001 - Message class for CWB settings maintenance programs

• Message number: 109

• Message text: Custom aggregate routine not defined for field &2 of table &1

What causes this issue?

Custom aggregate routine was not defined for field &V2& of table &V1&
although this field was chosen to be aggregated with custom aggregate
routine.

System Response

The conversion program for table &V1& will not be generated correctly.

How to fix this error?

Please provide the custom aggregate routine for field &V2& of table
&V1&, choose one of predefined aggregation functions or remove the
field from the list of fields to be aggregated.

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.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_00001109 - Custom aggregate routine not defined for field &2 of table &1 ?

  The SAP error message CNV_00001109 indicates that a custom aggregate routine has not been defined for a specific field in a specified table. This error typically arises during data migration or conversion processes, particularly when using the SAP Data Migration tools or during the execution of a conversion program.
  Cause:
  
  Missing Custom Aggregate Routine: The primary cause of this error is that the system expects a custom aggregate routine for the specified field in the specified table, but it has not been defined.
  Configuration Issues: There may be configuration issues in the data migration settings or the mapping of fields that require aggregation.
  Incorrect Table or Field Reference: The error may also occur if the table or field referenced in the error message is incorrect or does not exist in the current context.
  
  Solution:
  
  
  Define the Custom Aggregate Routine:
  
  You need to create a custom aggregate routine for the specified field in the specified table. This can typically be done in the ABAP Workbench (transaction SE80 or SE38).
  Ensure that the routine correctly handles the aggregation logic required for the field.
  
  
  
  Check Configuration:
  
  Review the configuration settings for the data migration or conversion process. Ensure that all necessary mappings and routines are correctly defined.
  If you are using a standard migration tool, check the documentation to see if there are any prerequisites or additional steps required for the specific field.
  
  
  
  Consult Documentation:
  
  Refer to the SAP documentation related to the specific migration tool or process you are using. There may be specific instructions or examples for defining custom aggregate routines.
  
  
  
  Testing:
  
  After defining the custom aggregate routine, test the migration or conversion process again to ensure that the error is resolved.
  
  
  
  Seek Help from SAP Support:
  
  If you are unable to resolve the issue, consider reaching out to SAP Support or consulting with an SAP expert who has experience with data migration and conversion processes.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE80 (Object Navigator), SE38 (ABAP Editor), and others that may be useful for debugging and defining routines.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on defining custom aggregate routines.
  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 address the CNV_00001109 error and successfully define the necessary custom aggregate routine for your data migration or conversion process.