yes I’m receiving the same error
root@swi-mdm9x15:/sys/class/gpio# echo 34 > export
sh: write error: Operation not permitted
and under Dev Studio I get a missing biding “gpioCf3Demo.gpioCf3PinComponent.le_gpioPin34 → gpioService.le_gpioPin34” which I had declared in adef. Must be related to the same error.
@dfrey I used your fix Controlling WP_GPIO_1 / GPIO22 problem - #7 by nilsarve , It didn’t t help. I am using legato 17.6 framework and also on target (mangoh red WP85).
If it can help you can TeamViewer on my environment.
Cheers. Gilles