Hi Bryan!

Well, usually all changed input assignments are indeed saved in the engines cfg-file (in the cfg folder), but there are a few modules for which I had to write-protect this cfg-file to correctly work with my code (e.g. all Fidelity EAG and EAS machines), so of course saving anything in these cfg-files will fail.
Completely removing this read-only attribute is not a good idea, because then you'll have troubles in playing with those modules, but if you have to set you input assginments only once, then you could remove this write-protection before, then make your input changes and exit CB-Emu, and then you can write-protect the cfg-file again.

Regards,
Franz