How To Fix CNV_DMC_MC_EXCEPTION171 - &1-&2: Source structure &3 is not mapped to the target structure &4

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 171

• Message text: &1-&2: Source structure &3 is not mapped to the target structure &4

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_DMC_MC_EXCEPTION171 - &1-&2: Source structure &3 is not mapped to the target structure &4 ?

  The SAP error message CNV_DMC_MC_EXCEPTION171 typically occurs during data migration processes, particularly when using the SAP Data Migration Cockpit (DMC) or similar tools. This error indicates that there is a mismatch between the source structure and the target structure in the data mapping configuration.
  Cause:
  The error message CNV_DMC_MC_EXCEPTION171 is triggered when:
  
  Unmapped Fields: Certain fields in the source structure are not mapped to any corresponding fields in the target structure.
  Incorrect Mapping Configuration: The mapping configuration may be incomplete or incorrect, leading to discrepancies between the source and target data models.
  Changes in Data Model: If there have been changes in the source or target data models after the mapping was initially set up, it could lead to this error.
  Data Migration Template Issues: The data migration template may not have been properly configured to include all necessary mappings.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Check Mapping Configuration:
  
  Go to the data migration project in the SAP Data Migration Cockpit.
  Review the mapping configuration for the specific source and target structures mentioned in the error message.
  Ensure that all fields in the source structure are correctly mapped to the corresponding fields in the target structure.
  
  
  
  Update Mapping:
  
  If you find any unmapped fields, either map them to the appropriate target fields or remove them from the source structure if they are not needed.
  If there are new fields in the target structure that need to be populated, ensure that they are included in the mapping.
  
  
  
  Validate Data Model:
  
  Ensure that the source and target data models are aligned and that any recent changes have been reflected in the mapping configuration.
  
  
  
  Test Migration:
  
  After making the necessary adjustments, run a test migration to verify that the error has been resolved.
  
  
  
  Consult Documentation:
  
  Refer to the SAP documentation for the Data Migration Cockpit for detailed guidance on mapping configurations and best practices.
  
  
  
  Seek Support:
  
  If the issue persists, consider reaching out to SAP support or consulting with an SAP expert who specializes in data migration.
  
  
  
  Related Information:
  
  SAP Data Migration Cockpit: A tool used for migrating data from legacy systems to SAP systems, providing templates and mapping capabilities.
  Data Mapping: The process of defining how data from the source system corresponds to the target system, including field mappings and transformations.
  Error Logs: Check the error logs for additional details that may provide more context about the specific fields causing the issue.
  
  By following these steps, you should be able to identify and resolve the cause of the CNV_DMC_MC_EXCEPTION171 error in your SAP data migration process.