How To Fix CNV077 - Transparent key fields are changed in table &. No cluster technique.

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV - Conversion: Messages for Conversion Services (CNCC)

• Message number: 077

• Message text: Transparent key fields are changed in table &. No cluster technique.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV077 - Transparent key fields are changed in table &. No cluster technique. ?

  The SAP error message CNV077 indicates that there are changes to transparent key fields in a specific table, which is not allowed when using certain data migration techniques. This error typically arises during data migration processes, especially when using the SAP Landscape Transformation (SLT) or other data conversion tools.
  Cause:
  
  Key Field Changes: The error occurs when there are modifications to the key fields of a transparent table. Key fields are essential for uniquely identifying records in a database table, and changing them can lead to data integrity issues.
  Cluster Tables: The message also mentions "No cluster technique," which implies that the system is expecting a certain data structure (like cluster tables) that is not being utilized in this case.
  Data Migration Process: This error is often encountered during data migration or conversion processes where the structure of the data being migrated does not match the expected structure in the target system.
  
  Solution:
  
  Review Key Field Changes: Check the data migration mapping and ensure that no key fields are being altered. If changes are necessary, consider whether they can be handled differently without modifying the key fields.
  Data Mapping: Ensure that the data mapping between the source and target systems is correctly defined. If key fields need to be preserved, make sure they are not included in the transformation logic that modifies them.
  Use Correct Techniques: If the migration process requires the use of cluster tables, ensure that the appropriate techniques and tools are being used. You may need to adjust your migration strategy to accommodate the requirements of the target system.
  Consult Documentation: Refer to SAP documentation or notes related to the specific migration tool you are using. There may be specific guidelines or best practices for handling key fields during migration.
  Testing: Conduct thorough testing of the migration process in a development or test environment before executing it in production. This can help identify potential issues early on.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on handling key field changes during data migration.
  Data Migration Tools: Familiarize yourself with the tools and techniques available for data migration in SAP, such as SAP Data Services, SLT, or the SAP S/4HANA Migration Cockpit.
  SAP Community: Engage with the SAP Community or forums where other users may have encountered similar issues and can provide insights or solutions.
  
  By addressing the root cause of the error and ensuring that key fields remain unchanged during the migration process, you can resolve the CNV077 error effectively.