vtkOutputWindow (or its specific sub-class) invokes the vtkCommand::ErrorEvent when an error like the one you show is triggered. This means you’d have to provide an output window and set up observers for that instance.
vtkOutputWindow (or its specific sub-class) invokes the vtkCommand::ErrorEvent when an error like the one you show is triggered. This means you’d have to provide an output window and set up observers for that instance.