Cura 5.7.2 inserts M104 and M109 before start code even when M104/M109 S{material_print_temperature_layer_0} is in start code.

[Austenite2]

Cura Version

5.7.2

Operating System

Windows 11

Printer

Voron 2.4

Reproduction steps

In Machine Settings, Start G-code, add:

M140 S{material_bed_temperature_layer_0}
M104 S{material_print_temperature_layer_0}
M190 S{material_bed_temperature_layer_0}
M109 S{material_print_temperature_layer_0}
print_start

Also happens if use M104 S{material_print_temperature} instead

Actual results

Generated G-code still has M104 and M109 commands:

;Generated with Cura_SteamEngine 5.7.2
T0
M104 S265
M109 S265
M82 ;absolute extrusion mode
;Filament name = Progressive3D ABS Dark Grey Flow 90.5/91
;Filament type = ABS
;Filament weight = [85.19217265625001]
;Nozzle diameter = 0.6
M140 S125
M104 S265
M190 S125
M109 S265
print_start

Expected results

M104 and M109 lines aftert the T0 line should not be added to G-code.

Seems similar to #1036 and there are recent comments from other users about this issue in 5.7.2

Add your .zip and screenshots here ⬇️

[LilBub]

I could be wrong, seems similar to #19190

[GregValiant]

Yeah, this is a duplicate of #19204 .
@Austenite2 This bug has been fixed in 5.8beta so I'll mark this as a duplicate and go ahead and close it.

I've written a post-processor for 5.7.2 that removes those lines that Cura adds.
Unzip CuraPrependBugFix.zip and put the ".py" file into your configuration folder and the "scripts" sub-folder.
The post-processor will be available with the rest of them under "Extensions | Post Processing | Modify Gcode" and then "Add Script".

[Austenite2]

Apologies for the duplicate, and thanks for the script!