Description of problem: blank screen while opening guided editor rule


Version-Release number of selected component (if applicable):6.0.3


How reproducible:


Steps to Reproduce:
1. created rule using guided editor 
2. added consequence using "freeform drl" - refer actual rule below
3. saved and closed the editor. 
4. try to open the same rule.

Actual results:
 when I tried to open the rule on the editor shows blank screen

Expected results:
Supposed open actual rule in guided editor

Additional info:

rule "AgentBooking Rule"
	dialect "mvel"
	when
		agent : Agent( )
		currentDate : TransactionDate( )
		Number( eval( intValue >=2 )) from accumulate ( 		resEvent : ReservationEvent( agentId == agent.agentId , resdate == currentDate.eventDate ) from entry-point "reservationEvent"
,
			count(resEvent)) 
	then
		ReservationThresoldEvent thresoldevent = new ReservationThresoldEvent();
		thresoldevent.setAgentId( agent.getAgentId() );
		thresoldevent.setTxEventDate( currentDate.getEventDate() );
		kcontext.getKnowledgeRuntime().getEntryPoint("reservationTraceEvent").insert( thresoldevent );
end