Just for shigs, can you set the SSF command line in this emulator to SSF.exe [DTools] and delete the plugin settings in GameEx > Plugins > DTMount ? After that, enable debugging in the plugin settings, the mount command will help diagnose any problems. Let me know if it makes any difference. It sounds to me like null might be on to something, but I want to make sure the ISO is mounting. You should also produce a bat in the plugin settings after launching that you can run and see if it works but that doesn't support games in zip/7-zip/rar so it may not be helpful. My cabinet doesn't have SSF running yet (I'm in the process of moving my games to the server) but it was running before on 8.1 and I'm not sure there's any difference in 10, and I also don't recall if there are more specific command line args for this emu.