Multiple commands on single line bug RF3.5b3

[OwenD]

There seems to be a bug in RRF3.5b3 (But it could also affect earlier versions) whereby multiple commands on a single line either aren't all executed, or they aren't executed in the correct manner.
This came to light first with M703 not being executed when filaments are selected from DWC as in this thread

However I note that for example
M291 S3 P"test" G4 S1 G1 X50 Y50 M400 G1 X10 Y10 F1800 M118 S"Done"
The M291 does not block.

G28 M400 G1 X50 Y50 M400 G1 X10 Y10 F1800 M118 S"Done"
Only the G28 is executed

G1 X50 Y50 M400 G1 X10 Y10 F1800 M118 S"Done"
Works correctly

M701 S"test" M400 M703 M400 M118 S"Done"
Only the M701 is executed

[dc42]

@OwenD yes this is a known issue. In fact most 3D printer firmwares don't accept multiple commands on a line. The NIST standard for CNC GCode does allow them in certain circumstances, which is why RRF generally does allow them.

The general rule for RRF is this:

1. A T command must be on a line by itself.
2. A G or M command that does not cause the state to be stacked can be followed by another command. The commands that cause the state to be stacked are commands that cause a macro file to be executed (e.g. G28, G29, G32, M24, M98, M226, M600, M701) and M291.

[OwenD]

@dc42
Makes sense apart from DWC has always passed multiple M7xx commands for filament changes
Putting M703 in Tnpost.g doesn't really work as many time's your changing filament but not tools.
It could affect power loss scripts as well I guess?