How To Fix CNV_10020766 - &1, &2: Length of source field/obj. &3 and SDetObject &4 differ

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_10020 - Message class for package 10020

• Message number: 766

• Message text: &1, &2: Length of source field/obj. &3 and SDetObject &4 differ

What causes this issue?

The rule assigned to the component consists of a determination defined
in &V2&. The length of the passed parameter &V3& for the source
field/object doesn't match the length of the source determination object
&V4& (the lengths are shown in brackets).

How to fix this error?

In transaction CNV_10020_RDTOBJ, assign a passed parameter with a length
that matches the length of the source determination object.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_10020766 - &1, &2: Length of source field/obj. &3 and SDetObject &4 differ ?

  The SAP error message CNV_10020766 typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or other data transfer tools. This error indicates a mismatch in the length of the source field or object compared to the target structure or object.
  Cause:
  The error message CNV_10020766 is triggered when:
  
  The length of a source field (or object) does not match the expected length in the target structure.
  There may be a discrepancy in the data types or lengths defined in the source and target systems.
  The source data may contain values that exceed the defined length in the target structure, leading to truncation or data loss.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Field Lengths: 
  
  Review the field definitions in both the source and target systems. Ensure that the lengths of the fields match.
  If the source field is longer than the target field, consider truncating the data or adjusting the target field length if possible.
  
  
  
  Data Mapping:
  
  Verify the mapping of fields between the source and target. Ensure that the correct fields are being mapped and that their lengths are compatible.
  
  
  
  Data Cleansing:
  
  Cleanse the source data to ensure that it does not contain values that exceed the target field lengths. This may involve truncating or modifying the data before migration.
  
  
  
  Adjust Target Structure:
  
  If feasible, adjust the target structure to accommodate the source data. This may involve changing the data model or extending the field lengths in the target system.
  
  
  
  Review Migration Rules:
  
  Check the migration rules or transformation logic defined in the migration tool. Ensure that they correctly handle the data types and lengths.
  
  
  
  Testing:
  
  After making adjustments, perform a test migration with a subset of data to ensure that the error is resolved and that data integrity is maintained.
  
  
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like LTMC (for Migration Cockpit) or LTMOM (for Migration Object Modeler) to manage your migration projects.
  SAP Notes: Check for any relevant SAP Notes that may provide additional guidance or fixes related to this error.
  Documentation: Refer to the official SAP documentation for data migration and conversion processes to understand the requirements and best practices.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to successfully complete your data migration.