Message type: E = Error
Message class:  CNV_PE_UI -  
Message number: 816
Message text: Split definition is not yet supported by this UI, see long text
A split definition is maintained in the Knowledge Base for this
parameter. The current function does <ZH>not </>support the
configuration of this kind of parameter.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Go to Knowledge Base tab and remove the split rule definition.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message CNV_PE_UI816 indicates that the split definition feature is not supported by the user interface (UI) you are currently using. This error typically arises in the context of data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools.
Cause: Unsupported Feature: The error suggests that the UI you are using does not support the split definition feature, which is often used in data migration scenarios to handle complex data structures.
Configuration Issues: There may be configuration settings in the migration cockpit or the specific migration project that do not align with the requirements for using split definitions. Version Limitations: The version of the SAP system or the migration tool you are using may not support this feature.
Solution: Check Documentation: Review the official SAP documentation for the migration tool you are using to confirm whether split definitions are supported and under what conditions. Use Alternative UI: If possible,
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_PE_UI815 Success evaluation mapping for type ANY is not fully maintained
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_PE_UI814 Transformation Rule &1 not being used by Transformation Rule &2
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_PE_UI817 RELV_ID &1 already exists in Relevance table
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_PE_UI818 Select a transformation rule in the transformation rule tree on the left
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
Click on this link to search all SAP messages.