How To Fix CNV_20900044 - Error during update/modify to table &1

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_20900 - Message class for package CNV_20900

• Message number: 044

• Message text: Error during update/modify to table &1

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_20900044 - Error during update/modify to table &1 ?

  The SAP error message CNV_20900044 typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools. This error indicates that there was an issue while trying to update or modify a specific database table (denoted by &1 in the error message).
  Cause:
  The error can be caused by several factors, including:
  
  
  Data Integrity Issues: The data being migrated may violate constraints or rules defined in the target table, such as primary key violations, foreign key constraints, or unique constraints.
  
  
  Missing or Incorrect Data: The source data may be incomplete or formatted incorrectly, leading to issues when trying to insert or update records in the target table.
  
  
  Authorization Issues: The user executing the migration may not have the necessary permissions to modify the target table.
  
  
  Technical Issues: There may be underlying technical issues, such as database locks, system performance problems, or issues with the migration tool itself.
  
  
  Custom Code or Enhancements: If there are custom enhancements or modifications in the target system, they may interfere with the standard migration process.
  
  
  Solution:
  To resolve the CNV_20900044 error, you can take the following steps:
  
  
  Check the Error Log: Review the detailed error log or application log to identify the specific reason for the failure. This log may provide more context about the data causing the issue.
  
  
  Validate Source Data: Ensure that the data being migrated is complete, correctly formatted, and adheres to the constraints of the target table. You may need to clean or transform the data before migration.
  
  
  Check Constraints: Review the target table's structure and constraints to ensure that the incoming data does not violate any rules. This includes checking for primary keys, foreign keys, and unique constraints.
  
  
  User Authorizations: Verify that the user executing the migration has the necessary authorizations to perform updates or modifications on the target table.
  
  
  Database Locks: Check for any database locks that may be preventing updates to the table. You can use transaction codes like SM12 to view and manage locks.
  
  
  Test in a Development Environment: If possible, replicate the migration process in a development or test environment to identify and resolve issues without affecting the production system.
  
  
  Consult SAP Notes: Look for relevant SAP Notes or documentation that may address this specific error. SAP frequently updates its knowledge base with solutions for common issues.
  
  
  Engage SAP Support: If the issue persists and you cannot identify the cause, consider reaching out to SAP Support for assistance. Provide them with detailed information about the error and the context in which it occurred.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like SE11 (Data Dictionary), SE37 (Function Modules), and SLG1 (Application Log) to help diagnose and troubleshoot the issue.
  Migration Tools: Understand the specific migration tool you are using (e.g., SAP S/4HANA Migration Cockpit, LSMW) and its configuration, as different tools may have different requirements and settings.
  Documentation: Review SAP documentation related to data migration and conversion processes for best practices and guidelines.
  
  By following these steps, you should be able to identify the cause of the CNV_20900044 error and implement a solution to resolve it.