Validation script errors (ViException) attached to multivalue request property parameters were not shown in the Web Portal UI (4380896)

Validation script errors (ViException) attached to multivalue request property parameters were not shown in the Web Portal UI

• This issue affected multivalue parameters using the EditFkMultiComponent control.
• Single-value parameters were not impacted.

The exception was correctly raised on the backend and visible in developer tools (F12) or API logs, but no error message appeared for the end user.

The code that shows validation errors for single-value fields was not included for multi-value fields. 

Because of that, when a validation error occurred on a multi-value parameter, the UI didn’t show the message to the user. 

Example script:

Dim strVal = Convert.ToString(Value)
If strVal.Length > 0 Then
  If (strVal.Split(Chr(7)).Distinct().Count < 2) Then
    Throw New ViException(#LD("{0} - Please select at least two members.", strVal)#, ExceptionRelevance.EndUser)
  End If
End If

This has been acknowledged as Product Defect #542531 

If you encounter this problem, please contact our Support team and request for hotfix #542531 

The fix ensures the EditFkMultiComponent properly handles ViException results and displays them in the user interface.