How To Fix CNV_20000018 - Caution: Conversion of table &1 may terminate

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_20000 - Messages for fiscal year change

• Message number: 018

• Message text: Caution: Conversion of table &1 may terminate

What causes this issue?

During an org. dependent conversion, duplicate keys may occur for LIS
structures because the fiscal year variant is not part of the key.(see
also Note 765598)

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

If a duplicate key occurs during the conversion, the conversion process
is stopped for this table and the original status is re-created.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_20000018 - Caution: Conversion of table &1 may terminate ?

  The SAP error message CNV_20000018 indicates a caution regarding the conversion of a specific table during a data migration or conversion process. This message typically arises in the context of SAP's data migration tools, such as the SAP S/4HANA Migration Cockpit or other data conversion scenarios.
  Cause:
  The error message CNV_20000018 suggests that the conversion of the specified table (denoted as &1 in the message) may terminate unexpectedly. This can happen due to several reasons, including:
  
  Data Integrity Issues: The data in the table may not meet the required integrity constraints, leading to potential failures during conversion.
  Incompatible Data Types: There may be mismatches between the source and target data types, causing conversion issues.
  Large Volume of Data: If the table contains a large volume of data, it may lead to performance issues or timeouts during the conversion process.
  Missing or Incorrect Configuration: The conversion process may not be properly configured, leading to unexpected behavior.
  Custom Code or Enhancements: If there are custom developments or enhancements related to the table, they may interfere with the conversion process.
  
  Solution:
  To address the CNV_20000018 error, consider the following steps:
  
  
  Check Data Integrity: Review the data in the specified table for any inconsistencies or integrity violations. Ensure that all required fields are populated and that there are no duplicate keys or invalid entries.
  
  
  Review Data Types: Verify that the data types in the source system are compatible with those in the target system. Make necessary adjustments to ensure compatibility.
  
  
  Optimize Data Volume: If the table contains a large amount of data, consider breaking the conversion into smaller batches or filtering the data to reduce the volume being processed at one time.
  
  
  Configuration Review: Ensure that the conversion process is correctly configured. Review any settings or parameters that may affect the conversion.
  
  
  Check for Custom Code: If there are any custom developments related to the table, review them to ensure they do not interfere with the conversion process. You may need to temporarily disable or adjust these customizations.
  
  
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes or documentation related to the error message. There may be specific recommendations or patches available.
  
  
  Log Analysis: Review the logs generated during the conversion process for more detailed error messages or warnings that can provide additional context for the issue.
  
  
  Testing: If possible, perform a test conversion in a non-production environment to identify and resolve issues before executing the conversion in the production system.
  
  
  Related Information:
  
  SAP Notes: Search for SAP Notes related to the CNV_20000018 error for specific guidance or patches.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  Documentation: Review the official SAP documentation for the data migration tool you are using, as it may contain troubleshooting tips and best practices.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to successfully complete the table conversion.