close and submit the TBUI task from applet script

Hi All

Is there any scripting approach to close and submit the TBUI task from applet script ? we have used the below script  in our implementation and works fine for most of the places.but  gave an error in one TBUI flows. wanted to know if this below scrip is correct or any suggestions.

var bsTask = TheApplication().GetService("Task UI Service (SWE)");

                                var psIn = TheApplication().NewPropertySet();

                                var psOut = TheApplication().NewPropertySet();

                                bsTask.InvokeMethod("SubmitTask", psIn, psOut);