Hola
Yo tengo el mismo problema, me sale el siguiente mensaje de error:
error: 20
Se encontró un comando de código G no admitido o no valido en el bloque
En o cerca de la linea 0:
Trabajo detenido
Hello
I have the same problem, I get the following error message:
error: 20
Unsupported or invalid G-code command found in block
At or near line 0:
job stopped
I have moved this to your own thread so you can get the focus of the community on it.
Open the Console window in LightBurn.
Select the small switch on the right hand side of the Console window that says, “Show all”
Attempt the Job that produces the error.
When the error message arrives, select and copy the text from the Console window into a reply here.
We should see this unexpected Gcode that is creating the error.
Below I have pasted the copied error message and bad code:
ok
ok
Starting stream
john-john put bad code here to test the thing 
G00 G17 G40 G21 G54
G90
M4
M8
G0 X29.168Y29.025
G0 Z0
Layer C00
G91
G1 X7.5F18000S0
error:2
Numeric value format is not valid or missing an expected value.
On or near line 0:
Job halted
Stream completed in 0:00
ok
El mensaje de error que aparece es:
The error message that appears is:
En cualquier caso, he desinstaladlo la versión 1.2.04 y he instalado la 1.0.02 y ha desaparecido ese poblema. Mi problema con la versión 1.0.02 es que no me reconoce el R3 Pro Rotary Roller.
Gracias por su respuesta
In any case, I have uninstalled version 1.2.04 and installed 1.0.02 and that problem has disappeared. My problem with version 1.0.02 is that the R3 Pro Rotary Roller doesn’t recognize me.
Thanks for your reply
I am having the exact same issue. I just got this laser and am running the latest trial of LightBurn. if I save the gCode and run it directly on the laser it works fine.
If you were willing to attempt 1.2.04 again, I would invite you to save your gcode file for inspection. Error at or on line zero can be caused by selecting iLaser instead of GRBL in the Laser window. This selection adjusts the gcode correctly for the iLaser but it can generate this error on other devices.
Please copy the Error 20 message you are getting from your Console window along with a few lines on each side so we might help with this. Also, if you are willing and interested in attaching a g-code file into a reply here that would be helpful and very interesting.
PROBLEM SOLVED
I had my device set to “iLaser”.
I have configured it as GRBL and it works perfectly
Hola, tengo problemas con error 20 codigo g
Hello, I have problems with error 20 g code
In this thread the problem was selecting iLaser instead of GRBL for the Device Profile.
You may have made the same selection in error.
