How To Fix CNV_DMC_MC071 - Keyfield &1 must be at the top

CNV_DMC_MC071 - Overview

• Message type: E = Error

• Message class: CNV_DMC_MC - Migration Object Modeler

• Message number: 071

• Message text: Keyfield &1 must be at the top

Self-Explanatory Message

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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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CNV_DMC_MC071 - Details

• The SAP error message CNV_DMC_MC071 with the description "Keyfield &1 must be at the top" typically occurs during data migration processes, particularly when using the SAP Data Migration Cockpit (DMC) or similar tools. This error indicates that a key field, which is essential for the data structure, is not positioned correctly in the data file or mapping configuration.
  
  Cause:
  The error is caused by the requirement that key fields must be listed at the top of the data structure or mapping configuration. This is a common requirement in many data processing systems to ensure that the key fields are processed first, allowing for proper identification and linking of records.
  
  Solution:
  To resolve this error, you should:
  
  
  Check the Data Structure: Review the data structure or mapping configuration you are using for the migration. Ensure that the key field specified in the error message is positioned at the top of the list.
  
  
  Rearrange Fields: If the key