How To Fix CNVMBTCHECK030 - &1| The foreign key &2 and the referring field &3 have diff. types

SAP Error Message - Details

• Message type: E = Error

• Message class: CNVMBTCHECK - Messages for PCL Checks

• Message number: 030

• Message text: &1| The foreign key &2 and the referring field &3 have diff. types

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNVMBTCHECK030 - &1| The foreign key &2 and the referring field &3 have diff. types ?

  The SAP error message CNVMBTCHECK030 indicates a data consistency issue related to foreign key relationships in the database. Specifically, it states that the foreign key &2 and the referring field &3 have different data types. This can occur during data migration or conversion processes, particularly when using tools like SAP's Migration Cockpit or other data transfer methods.
  Cause:
  
  Data Type Mismatch: The foreign key field and the referring field are defined with different data types in the database schema. For example, one might be defined as an integer while the other is defined as a string or character type.
  Incorrect Mapping: During data migration, the mapping of fields may not have been set up correctly, leading to mismatches in data types.
  Legacy Data Issues: If data is being migrated from a legacy system, the data types in the legacy system may not align with the expected types in the SAP system.
  
  Solution:
  
  Check Data Types: Review the data types of both the foreign key and the referring field in the database schema. Ensure that they match. You can do this by checking the table definitions in the Data Dictionary (SE11).
  Adjust Mapping: If you are using a data migration tool, check the mapping configuration to ensure that the fields are correctly mapped and that their data types are compatible.
  Data Transformation: If necessary, transform the data before migration to ensure that the data types match. This may involve converting data types in the source data or adjusting the target schema.
  Modify Database Schema: If feasible, consider modifying the database schema to align the data types. This should be done with caution and typically requires thorough testing.
  Consult Documentation: Refer to SAP documentation or notes related to the specific migration or conversion process you are using for additional guidance.
  
  Related Information:
  
  Transaction Codes: Use transaction codes like SE11 (Data Dictionary) to check table definitions and SE14 (Database Utility) to manage database objects.
  SAP Notes: Search for relevant SAP Notes that may address this specific error or provide additional context on data migration issues.
  Testing: After making changes, conduct thorough testing to ensure that the data migration process works as expected without further errors.
  
  By addressing the data type mismatch and ensuring proper mapping, you should be able to resolve the CNVMBTCHECK030 error.