How To Fix CNV_PE577 - Unexpected error during load process; source client data changed

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_PE - General messages for posting engine

• Message number: 577

• Message text: Unexpected error during load process; source client data changed

What causes this issue?

The load process from client <ZH>&V1&</> started with last timestamp
<ZH>&V2&</> (that is the time when of one of the existing objects in the
source client was changed). At the end of the load process (which can
take several minutes), the last timestamp in the source client was
checked again and it is different:
Timestamp at the beginning,,<ZH>&V2&</>
Timestamp at the end,,<ZH>&V3&</>
The load process is inconsistent and was rolled back.

System Response

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

How to fix this error?

Re-execute the load process.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_PE577 - Unexpected error during load process; source client data changed ?

  The SAP error message CNV_PE577 indicates that there was an unexpected error during the data load process, specifically due to changes in the source client data. This error typically occurs in the context of data migration or data transfer processes, such as during a system conversion or when using SAP's data migration tools.
  Cause:
  
  
  Data Changes: The most common cause of this error is that the data in the source client has been modified after the data extraction process began. This can happen if:
  
  Data is being updated or changed in the source system while the migration process is ongoing.
  There are concurrent processes that modify the same data being loaded.
  
  
  
  Inconsistent Data State: If the data in the source client is not in a consistent state (e.g., missing records, referential integrity issues), it can lead to this error.
  
  
  Technical Issues: There may be underlying technical issues, such as network problems, database locks, or issues with the migration tool itself.
  
  
  Solution:
  
  
  Ensure Data Consistency:
  
  Before starting the data load process, ensure that no changes are being made to the source data. This may involve locking the source client or scheduling the migration during a maintenance window.
  
  
  
  Re-extract Data:
  
  If the data has changed, you may need to re-extract the data from the source system to ensure that you are working with the most current and consistent dataset.
  
  
  
  Check Logs:
  
  Review the logs generated during the migration process for more detailed error messages or warnings that can provide insights into what went wrong.
  
  
  
  Retry the Process:
  
  After ensuring that the data is stable and consistent, retry the data load process.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to the specific migration tool you are using (e.g., SAP S/4HANA Migration Cockpit, SAP Data Services) for any additional troubleshooting steps or known issues.
  
  
  
  Contact SAP Support:
  
  If the issue persists, consider reaching out to SAP Support for assistance. Provide them with detailed information about the error, including logs and the context in which it occurred.
  
  
  
  Related Information:
  
  Migration Tools: Familiarize yourself with the specific migration tools and their requirements, as different tools may have different prerequisites and best practices.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide guidance on best practices for data migration.
  Data Locking: Understand how to implement data locking mechanisms in your source system to prevent changes during the migration process.
  
  By following these steps, you should be able to address the CNV_PE577 error and successfully complete your data load process.