if I use Martin-Schnebbe macro i get :
Section 'gcode_macro` load_filament' is not a valid config section

Once the underlying issue is corrected, use the "RESTART"
command to reload the config and restart the host software.
Printer is halted

What i'm doing wrong

I find the error:
[gcode_macro` LOAD_FILAMENT] have to be:
[gcode_macro LOAD_FILAMENT]

Thanks - I edited my previous post!

I have hated this change ever since it was implemented because I cannot get it to work. I create these macros and when I try using them from the extrude menu, I get a temperature too low error. I put messages in the macros to see if they get called, but never see the message. Is there something I am missing? The macros I have will heat the extruder.

There is an issue with the heating macro as it does not wait for the filament to be extruded before turning off the heater. To fix this we need to insert an M400 before the M104 S0. It is not really necessary for the unload macro, since it quickly pulls the filament off the nozzle, but for the load one it may get the nozzle to be too cold for properly extrude the new filament.

{% if turn_off_extruder %}
        M400
        M104 S0 ; Turn off extruder heater
{% endif %}