Hal Error

 When I use the net command in my HAL file in LinuxCNC to connect a QtDragon pin (for example, net jogspeed_u qtdragon.slider-jogspeed-linear classic ladder.0.floatin-05) to a HAL signal, I get an error saying that the pin qtdragon.slider-jogspeed-linear does not exist. However, when I run the same command via the halcmd interface, no error occurs. What could be the reason for this issue?
 

Gui related pins need to be connected in the POSTgui hal file as the gui itself is not yet loaded when the regular hal files are run.

I never use the POSTgui, how can I use it

add 'POSTGUI_HALFILE = your_file_here.hal' to the [HAL] section of your ini file.
linuxcnc.org/docs/html/config/ini-config.html