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IndicatorMixin is not meant to be used directly. It is 'mixed in' with another button widget such as Qtvcp's PushButton widget or IndicatedPushButton widget

Link to manpage
linuxcnc.org/docs/devel/html/drivers/hal_gpio.html

First hint is here:
The GPIO line PIN3 can not be found.

PIN3 isn't a name of a pin, pins are named as per man page.

the config im tryng to use works in version 2.9.4, tomorow i will post my config here,

Have a look at Fanuc style numbered programs M98 Pn Ln

linuxcnc.org/docs/2.9/html/gcode/o-code....fanuc-style-programs
 

And it was great to see an Aussie take the win in the Moto2 at the British GP.
I feel sorry for Dixon, no Binder to blame for his performance.

Mine were 10 pound poms.

And to be sure we're quite proud of Australia being built by convicts.

Insult an Aussie and they'll take on as a badge of honour, Rats of Tobruk is an example, something the OP fails to understand, tho the little weasel hasn't bothered to reply.

forum.linuxcnc.org/38-general-linuxcnc-q...official-images-only

Index to major thread, there's a section regarding your query with an example for a simple 3 axis machine that works.