OPERATION FAILED: Unable to set direction of GPIO4 - openFrameworks not working

[steeley]

OF 0.10.1, RPI 3, Raspbian Stretch.

Non-gui examples button and relay seem ok. When you try to use any GPIO code
with an OF windowed application., you get the above error.
Rebooting doesn't fix it, so cannot use this addon.

Need a fix!!

[kashimAstro]

maybe it's just a permission issue, read this:
https://forum.openframeworks.cc/t/ofxgpio-update-debian-stretch/28430/8?u=kashim

[steeley]

Possibly, but since Raspbian Jessie GPIO should not require sudo.

Other apps/libraries I have tested do not have this problem.