How To Fix CNV_00001258 - No target field is mapped by multiple field mappings of source table &1

CNV_00001258 - Overview

• Message type: E = Error

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

• Message number: 258

• Message text: No target field is mapped by multiple field mappings of source table &1

Self-Explanatory Message

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CNV_00001258 - Details

• The SAP error message CNV_00001258 indicates that there is an issue with the mapping of fields during a data migration or conversion process. Specifically, it means that a target field in the target table is being mapped by multiple source fields from the source table, which is not allowed.
  
  Cause:
  This error typically arises in the context of data migration projects, especially when using tools like SAP's Data Migration Cockpit or other conversion tools. The root causes can include:
  
  Duplicate Mappings: Multiple source fields are incorrectly mapped to the same target field, leading to ambiguity about which source field's data should populate the target field.
  Configuration Errors: Errors in the configuration of the mapping settings, where the same target field is unintentionally assigned to multiple source fields.
  Data Model Changes: Changes in the data model that have not been reflected in the mapping configuration, leading to inconsistencies.
  
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Review