How to enter sleep mode and RTC wakeup on OpenCPU platform : usage of function Ql_SleepDisable()

hi everyone,
I run code on my BC20 module,when i load example_RTC, it come to reboot when call function Ql_SleepDisable(),How do I solve this problem?thanks.

RTC callback handle:
void Rtc_handler(u32 rtcId, void* param)
((s32)param) +=1;

if(Rtc_id == rtcId)
	Ql_SleepDisable();        //run to reboot with Exception called 


Please describe your problem in more detail. I don’t quite understand what problem you are encountering.thank you