QtDragon_HD Manual tool change

Hello,
following the instructions from chapter 10.5.6 HAL Pins, I entered the suggested code in postgui.hal. I would like to be notified when the tool needs to be changed.

Now it happens that if the command Tn or M6 is written in the G-code, the program stops and does not continue. Nowhere on the screen does a dialog box appear, for confirming that the tool has been replaced. I think the problem is that the dialog box doesn't appear.

What and where needs to be set for it to work.

Can you post your config files?

I am attaching the working CONFIG files and also the NC file. The tool limit command is commented out.

try un commenting these lines:

# create signals for tool loading loopback
#net tool-prep-loop iocontrol.0.tool-prepare => iocontrol.0.tool-prepared
#net tool-change-loop iocontrol.0.tool-change => iocontrol.0.tool-changed

I un commented it in the hal file.
Linuxcnc does not start, gives an error:
Pin 'iocontrol.0.tool-change' was already linked to signal 'tool-change-loop'

I can't find a duplicate of this part in my two HAL files.
There is a complete description of the error in the PDF attachment.

Sorry just uncomment this one:

net tool-prep-loop iocontrol.0.tool-prepare => iocontrol.0.tool-prepared

Yes, now is working. I receive message window with information. It is smart solution, it checks the tool number which is active.and don't prompt if toll is the same.

You don't need to justify yourself, I'm very glad that the problem is solved.
I myself worked in IT for 22 years and I know this situation well.
Once again, thank you very much.
Greetings
Tibor Zavrl