How To Fix CNV_DMC_SIN256 - Key Mapping creation failed RC=&1, contact SAP and create an incident

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_DMC_SIN - Messages for s-innovations migration

• Message number: 256

• Message text: Key Mapping creation failed RC=&1, contact SAP and create an incident

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_SIN256 - Key Mapping creation failed RC=&1, contact SAP and create an incident ?

  The SAP error message CNV_DMC_SIN256 indicates that there was a failure in the creation of key mapping during a data migration process, typically associated with the SAP Data Migration Cockpit (DMC) or similar tools. The error message includes a return code (RC) that can provide additional context about the nature of the failure.
  Possible Causes:
  
  Data Integrity Issues: There may be inconsistencies or integrity issues in the source data that prevent successful key mapping.
  Configuration Errors: Incorrect configuration settings in the migration cockpit or related tools can lead to this error.
  Missing Dependencies: Required objects or dependencies may be missing in the target system.
  Authorization Issues: The user executing the migration may not have the necessary authorizations to create key mappings.
  Technical Errors: There could be underlying technical issues, such as database connectivity problems or system performance issues.
  
  Solutions:
  
  Check Return Code (RC): Analyze the return code provided in the error message. This can give specific insights into what went wrong.
  Review Source Data: Ensure that the source data is clean and adheres to the expected format. Look for duplicates, null values, or other anomalies.
  Verify Configuration: Double-check the configuration settings in the Data Migration Cockpit to ensure they are set up correctly.
  Check Authorizations: Ensure that the user has the necessary permissions to perform the migration and create key mappings.
  Consult Logs: Review the logs generated during the migration process for more detailed error messages or warnings that can help identify the issue.
  SAP Notes and Documentation: Search for relevant SAP Notes or documentation that may address this specific error or provide guidance on troubleshooting.
  Contact SAP Support: If the issue persists after trying the above solutions, it may be necessary to contact SAP support and create an incident. Provide them with detailed information about the error, including the return code and any relevant logs.
  
  Related Information:
  
  SAP Data Migration Cockpit: Familiarize yourself with the functionalities and limitations of the DMC, as well as best practices for data migration.
  SAP Notes: Regularly check for updates or patches related to the DMC or the specific error message.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to diagnose and potentially resolve the CNV_DMC_SIN256 error. If not, SAP support will be your best resource for further assistance.