QtPlasmaC – Magic Comments not creating materials from G-code

Hi everyone,I’m trying to use the Magic Comments in QtPlasmaC to automatically create/select materials from my G-code.

Example:

​​​​​​​Result:
- QtPlasmaC shows an error like “invalid parameter in magic comment”
- The material is not created automatically


Material management in the GUI works normally

My goal is to automatically load correct cut settings (pierce height, cut height, feed rate, etc.) from the G-code generated in my CAM software.

Questions:
- Any specific setting to enable this feature in the INI / QtPlasmaC preferences?
- Could someone share a working example G-code header with material Magic Comments?​​​​​​​

Thanks a lot in advance for your help!
 

Hi

This morning I was running v2.9-238.315 and later tested with v2.10-009.072. The issue was present on both versions.

I continued testing and the problem only occurs with o=1 and o=2 magic comments.
o=0 was always working correctly and did not cause any issue.

With o=1 and o=2, the material was written to the *_material.cfg* file, but QtPlasmaC showed a parameter error and did not update the material list. A restart of QtPlasmaC was required for the new material to appear.

I found the cause inside the function rewrite_material_file() in qtplasmac_gcode.
The code checks material_reload like this:But on my installation, this command returns:Since TRUE cannot be converted to int(), a ValueError exception is raised.
This stops the reload process, which leads to the UI not updating and to the misleading “parameter missing” message.

I applied a workaround that accepts both 0/1 and TRUE/FALSE strings:
After this fix:

* o=1 and o=2 now correctly create or update materials
* the UI refreshes immediately
* no more incorrect popup message
* no restart of QtPlasmaC required
* o=0 continues to work as before

I also added a local improvement: after a new material is created, it is automatically selected as the current active material.

If needed, I can provide a clean patch and test G-code examples.
I am also available to run additional tests if required.

I have attached to this post the NGC file I have been using since this morning.
The temporary example file was not working either, except when using o=0

Thanks