LR Tip: "Unexpected Error" while clicking an action in Vugen script (LR version: 12.01)

VuGen hangs with the pop-up error as "Unexpected Error" when an Action is clicked. The below error messages are seen in the pop-up window.


"System.NullReferenceException: Object reference not set to an instance of an object.
   at HP.Utt.CodeEditorUtils.BackgroundRenderers.HighlightRenderer.Draw(TextView textView, DrawingContext drawingContext) ........"


This is a known issue with the Load Runner 12.01.


In order to fix this issue, Please apply the hotfix as provided by the HP R&D team.


You can raise a ticket with HP Software Support team for the hotfix.  And also for the steps to apply the hotfix suitable to your environment.