How To Fix CNV_20340016 - No merges for cycles (controlling area) exist; mapping values deleted

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_20340 - Messages for cycle conversion

• Message number: 016

• Message text: No merges for cycles (controlling area) exist; mapping values deleted

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_20340016 - No merges for cycles (controlling area) exist; mapping values deleted ?

  The SAP error message CNV_20340016 indicates that there are no merge cycles available for the specified controlling area during a data migration or conversion process. This error typically arises in the context of SAP's data migration tools, particularly when using the SAP S/4HANA Migration Cockpit or similar tools.
  Cause:
  
  Missing Merge Cycles: The error suggests that the system is unable to find any defined merge cycles for the controlling area in question. Merge cycles are necessary for the data conversion process to determine how to handle the mapping of values.
  Configuration Issues: There may be a configuration issue where the merge cycles have not been set up correctly or are missing entirely.
  Data Mapping Issues: If the data being migrated does not have corresponding entries in the mapping tables, this can lead to the deletion of mapping values.
  
  Solution:
  
  
  Check Merge Cycle Configuration:
  
  Go to the relevant transaction (e.g., transaction code OBY6 for controlling area settings) and verify that the merge cycles are correctly defined for the controlling area.
  Ensure that the merge cycles are active and properly configured.
  
  
  
  Define Merge Cycles:
  
  If no merge cycles exist, you may need to create them. This involves defining how different values should be merged during the migration process.
  Consult the SAP documentation or your SAP functional consultant for guidance on how to set up merge cycles.
  
  
  
  Review Mapping Tables:
  
  Check the mapping tables used in the migration process to ensure that they contain the necessary entries for the controlling area.
  If there are missing entries, you may need to populate these tables with the correct mapping values.
  
  
  
  Consult SAP Notes:
  
  Look for any relevant SAP Notes that may address this specific error. SAP frequently releases notes that provide fixes or workarounds for known issues.
  
  
  
  Testing:
  
  After making the necessary changes, perform a test migration to ensure that the error does not occur again.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as OBY6 (for controlling area settings) and SCC1 (for client copy) if applicable.
  SAP Documentation: Review the SAP Help Portal for detailed documentation on data migration and controlling area settings.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  
  If the problem persists after following these steps, it may be beneficial to consult with an SAP expert or your organization's SAP support team for further assistance.