How To Fix CNV_20320_CHECK028 - No implicit activity type merge exists

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_20320_CHECK - Messages for check functions (Activity Types merge)

• Message number: 028

• Message text: No implicit activity type merge exists

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_20320_CHECK028 - No implicit activity type merge exists ?

  The SAP error message CNV_20320_CHECK028 with the description "No implicit activity type merge exists" typically occurs during the data migration process, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools. This error indicates that the system is unable to find a suitable implicit merge for the specified activity types in the context of the migration.
  Cause:
  
  Activity Type Configuration: The error often arises when there are discrepancies or missing configurations related to activity types in the source or target system. This can happen if the activity types in the source system do not match those in the target system.
  Data Mapping Issues: If the mapping of activity types between the source and target systems is not correctly defined, the system may not be able to perform the necessary merges.
  Customizations: Custom activity types that are not recognized by the migration tool can also lead to this error.
  
  Solution:
  
  
  Check Activity Type Configuration:
  
  Verify that all activity types in the source system are correctly defined and exist in the target system.
  Ensure that the activity types are properly configured in the target system to allow for merging.
  
  
  
  Review Data Mapping:
  
  Check the mapping configuration in the migration tool to ensure that all activity types are correctly mapped from the source to the target.
  If necessary, create or adjust mappings for any missing or custom activity types.
  
  
  
  Use Explicit Merges:
  
  If implicit merges are not available, consider defining explicit merges for the activity types in question. This may involve creating custom logic to handle the merging process.
  
  
  
  Consult Documentation:
  
  Refer to the SAP documentation related to the specific migration tool you are using. There may be specific guidelines or prerequisites for handling activity types.
  
  
  
  Testing:
  
  After making the necessary adjustments, perform a test migration to ensure that the error is resolved and that the data is being migrated correctly.
  
  
  
  Seek Support:
  
  If the issue persists, consider reaching out to SAP support or consulting with an SAP expert who can provide more tailored assistance based on your specific system configuration and migration scenario.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on activity type merging during migration.
  Migration Cockpit Documentation: Review the official SAP documentation for the Migration Cockpit, which may provide insights into common issues and their resolutions.
  Community Forums: Engage with the SAP Community or other forums where SAP professionals discuss similar issues. You may find others who have encountered and resolved the same error.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.