[rules-users] startProcess("String") on StatefulSession.

I am getting one exception as : No SuchMethod Exception session.startProcess (Ljava.lang.String) when i executing the following code in one of the class : public static StatefulSession getSession() { if ( rulebase == null ) { rulebase = loadRuleBaseFromRuleAgent(); } session = rulebase.newStatefulSession(); System.out.println("strting process..."); session.startProcess("insuranceProcess"); System.out.println("Started Process.."); return session; } In above code if i commented out line : session.startProcess("insuranceProcess");(In above code..) the error was resolved and executing properly.. please let me know why we need to code : session.startProcess("insuranceProcess");.if i am not using startProcess("String") method,Does it create any session problem anywhere.Please guide me on this....... -- Regards, SB.Raghavendra.