How To Fix CNV_NCE_BAS170 - 1:1 mapping is empty

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_NCE_BAS - Number conversion engine: messages

• Message number: 170

• Message text: 1:1 mapping is empty

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_NCE_BAS170 - 1:1 mapping is empty ?

  The SAP error message CNV_NCE_BAS170 with the description "1:1 mapping is empty" typically occurs during data migration or conversion processes, particularly when using SAP's Conversion Tools or during the execution of a migration project. This error indicates that there is an issue with the mapping of data from the source system to the target system, specifically that the mapping for a 1:1 relationship is not defined or is empty.
  Cause:
  
  Missing Mapping Entries: The most common cause is that the mapping table or configuration for the data conversion does not have entries for the specific fields or objects that are expected to have a 1:1 mapping.
  Incorrect Configuration: There may be an error in the configuration settings or the mapping logic that leads to the absence of required mappings.
  Data Model Changes: Changes in the data model between the source and target systems may lead to missing mappings if the mapping was not updated accordingly.
  Incomplete Migration Preparation: If the migration preparation steps were not fully completed, it could result in missing mappings.
  
  Solution:
  
  Check Mapping Configuration: Review the mapping configuration in the migration tool. Ensure that all necessary 1:1 mappings are defined correctly.
  Update Mapping Tables: If you find that the mapping is indeed empty, you will need to populate the mapping tables with the correct entries. This may involve defining how fields in the source system correspond to fields in the target system.
  Review Migration Documentation: Consult the migration documentation or guidelines provided by SAP for the specific migration scenario you are working on. This may provide insights into required mappings.
  Run Mapping Validation: Use any available validation tools or reports to check for inconsistencies or missing mappings in your migration setup.
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional guidance on resolving mapping issues.
  Engage with SAP Support: If the issue persists and you cannot identify the cause, consider reaching out to SAP Support for assistance. They may provide insights based on your specific system configuration and migration scenario.
  
  Related Information:
  
  Migration Tools: Familiarize yourself with the specific SAP migration tools you are using (e.g., SAP S/4HANA Migration Cockpit, SAP Data Services) as they may have specific requirements for mapping.
  Data Model Documentation: Review the data model documentation for both the source and target systems to understand the expected mappings.
  Testing: After making changes to the mapping, conduct thorough testing to ensure that the data migration works as expected without further errors.
  
  By addressing the mapping configuration and ensuring that all necessary entries are present, you should be able to resolve the CNV_NCE_BAS170 error.