How To Fix CNV021 - Cannot add record to table &1

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 021

• Message text: Cannot add record to table &1

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV021 - Cannot add record to table &1 ?

  The SAP error message CNV021 "Cannot add record to table &1" typically occurs during data migration or conversion processes, particularly when using the SAP Data Migration Workbench or similar tools. This error indicates that there is an issue preventing a record from being added to a specified database table.
  Causes:
  
  Data Integrity Violations: The data being inserted may violate constraints such as primary keys, foreign keys, or unique constraints.
  Missing Required Fields: Required fields in the target table may not be populated in the data being migrated.
  Data Type Mismatches: The data types of the fields in the source data may not match the expected data types in the target table.
  Table Locking: The target table may be locked by another process, preventing new records from being added.
  Authorization Issues: The user performing the operation may not have the necessary authorizations to write to the target table.
  Custom Logic or Enhancements: Custom code or enhancements in the system may be preventing the insertion of records.
  
  Solutions:
  
  Check Data Integrity: Review the data being migrated to ensure it adheres to the constraints of the target table. Look for duplicate entries, missing required fields, or invalid data types.
  Validate Required Fields: Ensure that all required fields in the target table are populated in the source data.
  Data Type Conversion: If there are data type mismatches, convert the data to the appropriate types before migration.
  Check for Locks: Use transaction codes like SM12 to check for locks on the target table and resolve any conflicts.
  Review Authorizations: Ensure that the user has the necessary authorizations to perform the operation. This may involve checking roles and permissions in the SAP system.
  Debug Custom Logic: If there are custom enhancements or logic in place, review and debug them to identify any issues that may be causing the error.
  
  Related Information:
  
  Transaction Codes: Use transaction codes like SE11 (Data Dictionary), SE16 (Data Browser), and SM12 (Lock Entries) to investigate the issue further.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Logs and Traces: Review application logs (transaction SLG1) and short dumps (transaction ST22) for more detailed error messages that may provide additional context.
  
  By systematically addressing these potential causes, you should be able to resolve the CNV021 error and successfully add records to the specified table.