How To Fix CNV_PE021 - Posting key not known in sender system

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_PE - General messages for posting engine

• Message number: 021

• Message text: Posting key not known in sender system

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_PE021 - Posting key not known in sender system ?

  The SAP error message CNV_PE021: Posting key not known in sender system typically occurs during data migration or conversion processes, particularly when using the SAP Landscape Transformation (SLT) or other data migration tools. This error indicates that the posting key being referenced in the source system (sender system) is not recognized or does not exist.
  Causes:
  
  Missing Posting Key: The posting key that is being used in the data migration does not exist in the sender system. This could be due to a configuration issue or an oversight in the mapping of data.
  Incorrect Configuration: The sender system may not have the necessary configuration for the posting keys that are being used in the migration process.
  Data Mapping Issues: There may be discrepancies in the mapping of data between the source and target systems, leading to the use of an invalid posting key.
  Version Differences: Different versions of SAP may have different posting keys, and if the source system is on an older version, it may not recognize keys that are valid in the target system.
  
  Solutions:
  
  Check Posting Keys: Verify that the posting keys used in the migration process exist in the sender system. You can do this by checking the configuration in the relevant SAP modules (e.g., FI, CO).
  Update Configuration: If the posting key is missing, you may need to create it in the sender system or adjust the configuration to ensure that the necessary posting keys are available.
  Review Data Mapping: Ensure that the data mapping between the source and target systems is correct. This includes checking that the posting keys are correctly mapped and that there are no discrepancies.
  Consult Documentation: Refer to SAP documentation or notes related to the specific migration tool you are using. There may be specific guidelines or updates that address this issue.
  Testing: Conduct tests in a development or sandbox environment to ensure that the changes made resolve the issue before applying them to the production environment.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to the error message CNV_PE021. SAP frequently updates its knowledge base with solutions for common issues.
  Transaction Codes: Use transaction codes like OB52 (for posting periods) or OBY6 (for posting keys) to review and manage posting keys in the system.
  Migration Tools: If you are using specific migration tools (like SAP S/4HANA Migration Cockpit), refer to their documentation for additional troubleshooting steps.
  
  If the issue persists after following these steps, it may be beneficial to engage with SAP support or a consultant who specializes in data migration to further investigate the problem.