unexport gpio results in "ash: write error: Invalid argument"

Official Hardware Classic Yún
1

Hi!

I can't unexport any gpio. Result is:

root@arduino:/etc# echo 19 > /sys/class/gpio/unexport
ash: write error: Invalid argument

What can be the reason?

Cheers,
Patriko

2

Did you export the pin 19 before trying to unexport it?