@jgeibel still does not work. log file says that there is no emulator attached to the folder. With that language is still makes me think that it it looking for a single emulator binary to pay attention to for each folder

Can you turn the power to them on and off in a software loop?

Hello,

Here is the solution I found :

1/ In the file /home/pi/.attract/emulators/Multiple Arcade Machine Emulator.cfg :

executable /opt/retropie/supplementary/runcommand/runcommand.sh args 0 _SYS_ mame-libretro "[romfilename]"

2/ In the file /opt/retropie/configs/mame-libretro/emulators.cfg

lr-mame2003 = "/opt/retropie/emulators/retroarch/bin/retroarch -L /opt/retropie/libretrocores/lr-mame2003/mame2003_libretro.so --config /opt/retropie/configs/all/retroarch/retroarch.cfg %ROM%" default = "lr-mame2003"

3/ In the file /opt/retropie/configs/mame-libretro/retroarch.cfg

input_remapping_directory = "/opt/retropie/configs/mame-libretro/"

4/ In the file /usr/sbin/rgbcommander/rgbcmdd.xml , section MAME, place :

<emulator binary="mame-libretro" name="Multiple Arcade Machine Emulator" active="Blue" inactive="DimGray" arcade="1" retropie="1" retropiebinary="retroarch" reference="arcade">

5/ To continue using overlays (example for the game 1943)
Create the file 1943.cfg in the directory /home/pi/RetroPie/roms/mame-libretro/roms :

input_overlay = /opt/retropie/configs/all/retroarch/overlay/arcade-artwork/1943.cfg input_overlay_enable = true input_overlay_opacity = 0.900000 input_overlay_scale = 1.000000

and in the file /opt/retropie/configs/all/retroarch/overlay/arcade-artwork/1943.cfg :

overlays = 1 overlay0_overlay = 1943.png overlay0_full_screen = true overlay0_descs = 0

And the overlay image must be placed in /opt/retropie/configs/all/retroarch/overlay/arcade-artwork

6/ In the file /opt/retropie/configs/all/retroarch/retroarch.cfg, set the parameter config_save_on_exit :

config_save_on_exit = "false"

im having a similar issue but with advmame roms. I don't have any mame4all roms, but I'm guessing that our problems are similar. from what I am figuring out, it is a problem in the xml file.
you might have to add something like

<emulator binary="mame-mame4all" name="mame4all" active="Blue" inactive="DimGray" arcade="1" retropie="1" retropiebinary="mame4all" reference="arcade"/>

to your xml file.

From the logs, yes, it looks like the detection works ok. You can try contacting the author and provide the logs, maybe they have an idea what is going wrong here - the RetroPie side (emulators) is not changed from what is declared in the configuration.

Solved.

turned out it was actually a malfunction in RGBCommander; the developer contacted me directly to say he was working on a solution. He let me test a rebuilt daemon, and will roll the fix into his next release.

Check out this thread at Arcade Controls.

—Æ