For now there is no possible way to stop a groovy script from executing. If you create an infinite loop for example the application will crash in no time giving you no other option but to stop ReadyA...
Yes for supppose someone haven't use foloowing:
try and catch block or
testRunner.cancel or
testRunner.fail
then there is no mechanism by which i can stop the execution of Groovy Step.
There must be a stop button by which i cant stop the execution at any time .