How To Fix CNV_DMC_MC_EXCEPTION020 - A rule with this name already exists

CNV_DMC_MC_EXCEPTION020 - Overview

• Message type: E = Error

• Message class: CNV_DMC_MC_EXCEPTION - Exception texts of Migration Object Modeller

• Message number: 020

• Message text: A rule with this name already exists

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_DMC_MC_EXCEPTION020 - A rule with this name already exists ?

  The SAP error message CNV_DMC_MC_EXCEPTION020 indicates that there is an attempt to create a rule in the Data Migration Cockpit (DMC) that already exists. This typically occurs during data migration processes when duplicate rules are being defined.
  
  Cause:
  
  Duplicate Rule Creation: The most common cause of this error is that a rule with the same name has already been created in the system. This can happen if:
  The same migration project is being executed multiple times without proper cleanup.
  There is a misunderstanding in naming conventions leading to unintentional duplicates.
  A previous migration attempt was not completed or was interrupted, leaving behind existing rules.
  
  
  
  
  Solution:
  
  
  Check Existing Rules: 
  
  Navigate to the Data Migration Cockpit and check the list of existing rules. Look for the rule name that is causing the conflict.
  
  
  
  Rename or Delete Existing Rule:
  
  If you find a rule with the same name, you can either rename it or delete it if it is no longer needed.
  Ensure