How To Fix CNV_DMC_MC_EXCEPTION234 - Message ID already exists

CNV_DMC_MC_EXCEPTION234 - Overview

• Message type: E = Error

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

• Message number: 234

• Message text: Message ID 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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_DMC_MC_EXCEPTION234 - Message ID already exists ?

  The SAP error message CNV_DMC_MC_EXCEPTION234 with the description "Message ID already exists" typically occurs during data migration or conversion processes, particularly when using the SAP Data Migration Cockpit (DMC) or similar tools. This error indicates that there is a conflict with an existing message ID in the system, which can happen for various reasons.
  Causes:
  
  Duplicate Message IDs: The most common cause is that the message ID you are trying to create or use already exists in the system. This can happen if the same migration object or message is being processed multiple times.
  
  Configuration Issues: There may be issues in the configuration of the migration project or the mapping of data that leads to the generation of duplicate message IDs.
  Data Consistency: If the data being migrated has inconsistencies or duplicates, it may lead to conflicts in message IDs.
  
  Solutions:
  
  Check for Duplicates: Review the migration logs and the data being processed to identify if