How To Fix CNV_PE_CHECK026 - Error instantiating the transformation rule; see long text

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_PE_CHECK - Check Framework messages for posting engine

• Message number: 026

• Message text: Error instantiating the transformation rule; see long text

What causes this issue?

The instantiation of the transformation rule failed with error message:
&V1&
Most likely the transformation rule was changed in a parallel session
(SAP GUI window), but you did <ZH>not </>close and reopen this session
after the change (in the first session) was saved.

System Response

Error

How to fix this error?

Leave this transaction and reopen it. Try the operation again.
If the error remains, contact SAP for support.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_PE_CHECK026 - Error instantiating the transformation rule; see long text ?

  The SAP error message CNV_PE_CHECK026 typically occurs during data migration or transformation processes, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools. This error indicates that there is an issue with instantiating a transformation rule, which is essential for mapping source data to the target structure.
  Cause:
  The error can be caused by several factors, including:
  
  Missing or Incorrect Transformation Rules: The transformation rules defined for the data migration might be missing, incomplete, or incorrectly configured.
  Data Type Mismatches: There may be a mismatch between the data types of the source and target fields, which prevents the transformation from being instantiated.
  Configuration Issues: There could be issues in the configuration of the migration project or the specific transformation rules.
  Dependencies Not Met: The transformation might depend on other rules or configurations that are not properly set up or are missing.
  Authorization Issues: The user executing the migration might not have the necessary authorizations to access the transformation rules.
  
  Solution:
  To resolve the CNV_PE_CHECK026 error, you can take the following steps:
  
  
  Check Transformation Rules:
  
  Review the transformation rules defined in the migration project. Ensure that all necessary rules are present and correctly configured.
  Validate the mapping of source fields to target fields to ensure they are compatible.
  
  
  
  Data Type Validation:
  
  Verify that the data types of the source and target fields match. If there are discrepancies, adjust the transformation rules accordingly.
  
  
  
  Review Configuration:
  
  Check the overall configuration of the migration project. Ensure that all settings are correctly defined and that there are no missing components.
  
  
  
  Check Dependencies:
  
  Ensure that any dependencies required by the transformation rules are met. This may involve checking other rules or configurations that the current rule relies on.
  
  
  
  Authorization Check:
  
  Confirm that the user executing the migration has the necessary authorizations to access and execute the transformation rules.
  
  
  
  Consult Documentation:
  
  Refer to the SAP documentation or notes related to the specific migration tool you are using for any additional troubleshooting steps or known issues.
  
  
  
  Debugging:
  
  If the issue persists, consider enabling debugging or logging to gather more detailed information about the error, which can help in diagnosing the problem.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional guidance.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  SAP Support: If you are unable to resolve the issue, consider reaching out to SAP Support for assistance, providing them with detailed information about the error and the context in which it occurred.
  
  By following these steps, you should be able to identify and resolve the underlying cause of the CNV_PE_CHECK026 error.