How To Fix CNV_PE_CHECK121 - Interface 1 &1 is unequal to the required interface 1 &2

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_PE_CHECK - Check Framework messages for posting engine

• Message number: 121

• Message text: Interface 1 &1 is unequal to the required interface 1 &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_PE_CHECK121 - Interface 1 &1 is unequal to the required interface 1 &2 ?

  The SAP error message CNV_PE_CHECK121 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 there is a mismatch between the expected interface and the actual interface being used in the data migration process.
  Cause:
  The error message CNV_PE_CHECK121 is triggered when the system detects that the interface being used (Interface 1) does not match the required interface (Interface 2). This can happen due to several reasons, including:
  
  Incorrect Configuration: The migration or conversion settings may not be configured correctly, leading to the use of an incorrect interface.
  Data Mapping Issues: The data being migrated may not be mapped correctly to the expected structure or format.
  Version Mismatch: There may be a version mismatch between the source and target systems, causing incompatibility in the interfaces.
  Missing or Incorrect Data: The data being processed may be incomplete or not conforming to the expected format.
  
  Solution:
  To resolve the CNV_PE_CHECK121 error, you can follow these steps:
  
  
  Check Configuration: Review the configuration settings for the data migration process. Ensure that the correct interfaces are selected and that all necessary parameters are set correctly.
  
  
  Validate Data Mapping: Ensure that the data being migrated is correctly mapped to the expected fields in the target system. Check for any discrepancies in data types or structures.
  
  
  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 the expected interfaces and configurations.
  
  
  Check for Updates: Ensure that both the source and target systems are updated to the latest versions. Sometimes, updates can resolve compatibility issues.
  
  
  Test with Sample Data: If possible, run a test migration with a small set of sample data to identify if the issue persists. This can help isolate the problem.
  
  
  Consult SAP Notes: Search for relevant SAP Notes or Knowledge Base Articles (KBAs) that may address this specific error. SAP frequently updates its documentation with solutions to common issues.
  
  
  Engage SAP Support: If the issue persists after trying the above steps, consider reaching out to SAP Support for further assistance. Provide them with detailed information about the error, including any logs or screenshots.
  
  
  Related Information:
  
  Migration Cockpit: Familiarize yourself with the SAP S/4HANA Migration Cockpit, as it provides tools and guidelines for data migration.
  Data Migration Best Practices: Review best practices for data migration to ensure a smooth process.
  SAP Community: Engage with the SAP Community forums where other users may have encountered similar issues and can provide insights or solutions.
  
  By following these steps, you should be able to identify and resolve the cause of the CNV_PE_CHECK121 error in your SAP environment.