For most emulators, the result is something like this:
/home/pi/RetroPie/supplementary/runcommand/runcommand.sh: line 15: /home/pi/RetroPie/emulators/gsps/raspberrypi/gpsp: No such file or directory
For MAME it’s different:
Gauntlt1.6p NOT FOUND
ERROR: required files are missing, the game cannot be run.
RetroArch [WARN] :: [GL]: Stock GLSL shaders will be used.
RetroArch [ERROR] :: Implementation does not support save states. Cannot use rewind.
All roms and MAME files (romset 0.145, but the version doesn’t seem to make much difference)work on other computers. Even when installing an additional .chd file for MAME games, I get the same result.
I ran the setup script from the beginning to see if an updated version would change anything. Now the problem seems to affect only Sega (Megadrive) and Game Boy Advance.