How To Fix CNV_10020144 - &1 &2: Lengths of SDetObject &3 and source field &4 differ

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_10020 - Message class for package 10020

• Message number: 144

• Message text: &1 &2: Lengths of SDetObject &3 and source field &4 differ

What causes this issue?

For this DTFLD record, source field &V4& has been assigned to
<DS:DE.CNV_10020_DTOBJ_S>source determination object</> &V3&. (The
value given in brackets is the corresponding allowed number of
characters.)
The system found that the length of the source determination object
does not correspond to the length of the source field. However this
must be the case.

How to fix this error?

The most likely reason for this is that a wrong source field has been
assigned. Correct the definition accordingly.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_10020144 - &1 &2: Lengths of SDetObject &3 and source field &4 differ ?

  The SAP error message CNV_10020144 typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools. This error indicates that there is a mismatch in the lengths of the source field and the target field in the data structure being processed.
  Cause:
  The error message can arise due to several reasons:
  
  Field Length Mismatch: The length of the source field (from the legacy system or source data) does not match the expected length of the target field in the SAP system.
  Data Type Differences: The data types of the source and target fields may not be compatible, leading to issues during the data transfer.
  Incorrect Mapping: The mapping configuration between the source and target fields may be incorrect, causing the system to expect a different length than what is provided.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Field Lengths: Verify the lengths of the source and target fields. Ensure that the source data does not exceed the maximum length defined for the target field in SAP.
  
  
  Adjust Source Data: If the source data contains values that exceed the target field length, you may need to truncate or modify the data in the source system before migration.
  
  
  Review Data Mapping: Check the mapping configuration in the migration tool. Ensure that the fields are correctly mapped and that the expected lengths are aligned.
  
  
  Data Type Compatibility: Ensure that the data types of the source and target fields are compatible. If necessary, convert the data types in the source data to match the target field requirements.
  
  
  Consult Documentation: Refer to the SAP documentation for the specific migration tool you are using. There may be guidelines or best practices for handling field length issues.
  
  
  Testing: After making adjustments, perform a test migration with a small dataset to ensure that the changes resolve the issue before proceeding with the full migration.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or solutions for this specific error message.
  Migration Cockpit Documentation: Review the official SAP documentation for the Migration Cockpit or the specific data migration tool you are using for detailed instructions and troubleshooting tips.
  Community Forums: Consider searching or posting in SAP community forums or discussion groups, as other users may have encountered and resolved similar issues.
  
  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.