Beaglebone black - kernel 4.1 - PRU initialization - segmentation fault

Hello,

My BBB is running with kernel 4.1. I am using PRU for PWM.
I set a pin to PRU output using ‘config-pin’ utility. e.g. : config-pin P9_27 pruout. But during pru initialization process, I get a segmentation fault.
Can anyone help me out with this segmentation fault?

Thanks,
Anuja