Optional Stop ( M1 )

Dear Community,
today i was tested some functions in Gmoccapy  (LinuxCNC 2.8.3) and i was very suprised the "Optional Stop" ( for M1 ) didnt works.
The Button 7 in Auto Mode is for "Optional Blocks" ( Whatever its be, but isnt the same like for M1 ).
How can i get the function "Optional Stop"?
Thank you so much in advance.
Cheers
Reinhard

Were you trying to change optional stop while the program was running?
That is not supported in linuxcnc.

Hello cmorley,
it is doesnt matter if i press the button while is the program is running or before, the result is the same.
I took a look in the hal, the button works on "Optional Blocks" not at M1
A hal pin is there, with the name "Optional Stop".
What kind of function have "Optional Blocks" ???

optional blocks is a way to select lines of code that can be optionally run.
It again can also only be preset before running.

but Yes I don not see away to set optional stop in gmoccapy.
In master branch I do see commented out code to toggle it though.
I'm not sure why it would have been removed.

the code has been commented out in 2.8 as well.

Hello cmorley,
thank you so much for the information.
what is to do, to works with optional blocks ?
It is a special order in G-Code?

took me a bit to find it:
linuxcnc.org/docs/stable/html/gcode/overview.html#_block_delete

Sorry maybe I miss understood.
Are you asking how to get optional stop to work in GMoccapy?

Hello cmorley,
yes that was my question .... but i read the block delete, if i understand right, i can do close to the same action.
as sample:
/ M1
would like be the same like the optional stop?
Right?

Hello cmorley,
thank you so much, the sample is working.
The Function "Block delete" have much more possibilities and the optional stop is working too
"/ M1" or "/ M0" is working too.
its really not so bad this function

Cheers
Reinhard