DWM1001 - Problem using Header J7 as GPIO output

Hi, I’m trying to use GPIO_27 (from Header J7) as an OUTPUT but is not working.

// Configure GPIO_27 as output
dwt_setgpiodirection(27,0);

// Set high GPIO_27
dwt_setgpiovalue(27,1);

Why is this not working?

Thanks a lot!

Victor