How To Fix CNV_PE_UI155 - An unexpected error occurred while calling the transformation rule editor

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_PE_UI -

• Message number: 155

• Message text: An unexpected error occurred while calling the transformation rule editor

What causes this issue?

Further details (if existing): <ZH>&V1&</>

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?

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_PE_UI155 - An unexpected error occurred while calling the transformation rule editor ?

  The SAP error message CNV_PE_UI155 indicates that there was an unexpected error while trying to access the transformation rule editor in the context of a data migration or conversion process. This error typically arises in the SAP Landscape Transformation (SLT) or during data migration projects using the SAP Conversion Tools.
  Possible Causes:
  
  System Configuration Issues: There may be misconfigurations in the system settings or in the transport layer.
  Authorization Problems: The user may not have the necessary authorizations to access the transformation rule editor.
  Technical Issues: There could be underlying technical issues such as missing components, corrupted files, or issues with the SAP GUI.
  Network Issues: If the transformation rule editor is being accessed over a network, connectivity issues could lead to this error.
  Software Bugs: There may be bugs in the version of the software being used, especially if it is an older version.
  
  Solutions:
  
  Check Authorizations: Ensure that the user has the necessary authorizations to access the transformation rule editor. You may need to consult with your SAP security team.
  Review System Logs: Check the system logs (transaction code SLG1) for any additional error messages or warnings that could provide more context about the issue.
  Restart the SAP GUI: Sometimes, simply restarting the SAP GUI or the application server can resolve transient issues.
  Check Configuration: Review the configuration settings related to the data migration or transformation process to ensure everything is set up correctly.
  Update Software: If you are using an older version of SAP, consider applying the latest patches or updates, as these may contain fixes for known issues.
  Consult SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address this specific error message. SAP Notes often provide solutions or workarounds for known issues.
  Contact SAP Support: If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as LTMC (Legacy Transfer Migration Cockpit) or LTMOM (Migration Object Modeler) that may be involved in the data migration process.
  Documentation: Review the official SAP documentation related to data migration and transformation rules for best practices and troubleshooting tips.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to diagnose and potentially resolve the CNV_PE_UI155 error.