4DO "Failed to load content"

I have the bios in the system dir and have an iso and cue and loading either one gives the error. This has happened on 2 devices, mac and android.

The game is Myst(3DO).

It works fine here on linux (last 4do core) loading the iso (loading cue not worknig for me) using Myst\ (1994)(Panasonic)(US)[FZSM0204\ R1J].iso and panafz10.bin panafz1.bin in sysdir.

It was my fault, my extension was .rom and the proper one is .bin