How To Fix CNV_00001253 - Source table &1 is different to target table &2

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 253

• Message text: Source table &1 is different to target table &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_00001253 - Source table &1 is different to target table &2 ?

  The SAP error message CNV_00001253 indicates that there is a mismatch between the source table and the target table during a data migration or conversion process. This error typically arises in the context of SAP's data migration tools, such as the SAP S/4HANA Migration Cockpit or other data transfer processes.
  Cause:
  The error occurs when the structure (schema) of the source table (&1) does not match the structure of the target table (&2). This can happen due to several reasons, including:
  
  Different Field Definitions: The fields in the source table may have different data types, lengths, or attributes compared to the target table.
  Missing Fields: The target table may have additional fields that are not present in the source table.
  Field Order: The order of fields in the source and target tables may differ, which can lead to confusion during the mapping process.
  Data Conversion Rules: There may be specific conversion rules that are not being met due to the differences in table structures.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  Check Table Structures: Compare the structures of the source and target tables. You can use transaction codes like SE11 (Data Dictionary) to view the definitions of both tables.
  Adjust Mapping: If you are using a data migration tool, ensure that the mapping between the source and target fields is correctly defined. Adjust the mapping to ensure that all fields are aligned properly.
  Modify Source or Target Table: If necessary, you may need to modify either the source or target table to ensure that their structures match. This could involve adding missing fields, changing data types, or adjusting field lengths.
  Review Data Conversion Rules: Ensure that any data conversion rules are correctly applied and that they align with the expected formats in the target table.
  Consult Documentation: Refer to the SAP documentation for the specific migration tool you are using to understand any specific requirements or constraints related to the data migration process.
  
  Related Information:
  
  Transaction Codes: SE11 (Data Dictionary), SE80 (Object Navigator), and ST22 (Dump Analysis) can be useful for troubleshooting.
  SAP Notes: Check for any relevant SAP Notes that may address known issues or provide guidance on resolving this error.
  Data Migration Tools: Familiarize yourself with the specific data migration tool you are using, as each tool may have its own set of 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 the data migration process.