How To Fix CNV_NCE_BAS257 - Row &1: subobject name is empty

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_NCE_BAS - Number conversion engine: messages

• Message number: 257

• Message text: Row &1: subobject name is empty

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_NCE_BAS257 - Row &1: subobject name is empty ?

  The SAP error message CNV_NCE_BAS257 with the description "Row &1: subobject name is empty" 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 a required field, specifically the "subobject name," is missing or not populated in the data being processed.
  Cause:
  
  Missing Data: The most common cause is that the data being imported or migrated has an empty value for the subobject name field. This could be due to incomplete data preparation or extraction.
  Incorrect Mapping: If the mapping of fields from the source system to the target system is not correctly defined, it may lead to empty values being passed for required fields.
  Data Format Issues: Sometimes, the data format might not align with the expected format in SAP, leading to fields being interpreted as empty.
  
  Solution:
  
  Check Data Source: Review the source data to ensure that the subobject name field is populated for all relevant records. If it is missing, you will need to fill in this data before proceeding with the migration.
  Data Mapping Review: Verify the mapping configuration in the migration tool to ensure that the subobject name is correctly mapped from the source to the target. Make adjustments as necessary.
  Data Validation: Implement data validation checks before migration to catch any missing or incorrect data. This can help prevent errors during the migration process.
  Consult Documentation: Refer to the SAP documentation for the specific migration tool you are using to understand the requirements for the subobject name and any other related fields.
  Error Log Review: Check the detailed error logs provided by the migration tool for additional context or related errors that may help identify the root cause.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide guidance on data migration best practices.
  Migration Cockpit: Familiarize yourself with the SAP S/4HANA Migration Cockpit and its functionalities, as it provides tools for data mapping, validation, and error handling.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By addressing the root cause of the empty subobject name, you should be able to resolve the error and successfully complete your data migration process.