How To Fix CNV_MBT458 - Unknown exception during deregistration

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_MBT - PCL message class

• Message number: 458

• Message text: Unknown exception during deregistration

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.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_MBT458 - Unknown exception during deregistration ?

  The SAP error message CNV_MBT458 Unknown exception during deregistration typically occurs in the context of data migration or conversion processes, particularly when using the SAP Landscape Transformation (SLT) or SAP Data Migration tools. This error indicates that there was an unexpected issue during the deregistration process of a migration object or data set.
  Possible Causes:
  
  Data Integrity Issues: There may be inconsistencies or integrity issues in the data being processed.
  Configuration Errors: Incorrect configuration settings in the migration tool or the source/target systems can lead to this error.
  System Resource Limitations: Insufficient system resources (like memory or processing power) can cause unexpected exceptions.
  Software Bugs: There may be bugs in the version of the SAP software being used, which could lead to unexpected exceptions.
  Network Issues: If the migration involves multiple systems, network issues could interrupt the deregistration process.
  
  Solutions:
  
  Check Logs: Review the detailed logs for more specific error messages that can provide insight into the root cause. Look for any preceding errors that might indicate what went wrong.
  Data Validation: Ensure that the data being migrated is clean and adheres to the expected formats and constraints.
  Configuration Review: Double-check the configuration settings for the migration process to ensure they are correct.
  System Resources: Monitor system resources during the migration process to ensure that there are no bottlenecks. If necessary, allocate more resources or optimize the system.
  Update Software: Ensure that you are using the latest version of the SAP software and that all relevant patches have been applied.
  Retry the Process: Sometimes, simply retrying the deregistration process can resolve transient issues.
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes or Knowledge Base Articles that might address this specific error.
  Contact SAP Support: If the issue persists, consider reaching out to SAP Support for assistance, providing them with detailed logs and context about the error.
  
  Related Information:
  
  SAP Notes: Search for specific SAP Notes related to the CNV_MBT458 error for any known issues or fixes.
  Documentation: Review the official SAP documentation for the migration tools you are using to ensure that you are following the recommended procedures.
  Community Forums: Engage with the SAP Community or forums where other users may have encountered similar issues and can share their solutions.
  
  By following these steps, you should be able to diagnose and resolve the CNV_MBT458 error effectively.