Interpreter interp =
new Interpreter(groupThatCreatedThisInstance, locale, true);
InstanceScope scope = new InstanceScope(null, this);
interp.exec(wr, scope); // render and track events
List<InterpEvent> events = interp.getEvents();
EvalTemplateEvent overallTemplateEval =
(EvalTemplateEvent)events.get(events.size()-1);
STViz viz = new STViz(errMgr, overallTemplateEval, out.toString(), interp,
interp.getExecutionTrace(), errors.errors);
viz.open();
return viz;