Can't succesfully release Tool (according to Probe Basic GUI)

#ATC Settings

net analog1 hm2_7i76e.0.7i76.0.0.analogin1

setp comp.0.in1 10.0
net analog1 comp.0.in0

net ventil-spindel hm2_7i76e.0.7i76.0.0.output-12 <= motion.digital-out-02

net spindel-released comp.0.out <= motion.digital-in-02

In the HAL Show, I can see that spindle-released goes high when I press the "Release tool" button in the GUI. I also do not get an error message. However, when I insert the tool and click "clamp tool" I get the message "Failed to release tool" although everything works fine (and the spindle-released goes back to low). 

I found that I need to connect the motion.digital-in-02 [url=https://github.com/dpslwk/probe_basic/tree/subroutine_unify_and_move_to_nc_files/linuxcnc/nc_files/probe_basic/atc_carousel]here on the PB Github (manual is hard to find). 
I was unable to find more information on the PB Website. The current PB Github also doesn't have this Readme file/instructions.

Does anyone know what needs to be done here?

Thanks![/url]