ERR 26 - Famicom Disk System via Mesen Core

I’m getting ERR 26 (Unable to write to disk error) when i try to start Zelda 1 and 2. I tried the same roms in standalone and they work ok, also the files aren’t write protected or anything like that. Anyone know what might be causing this?

try to disable auto disk swapping if that helps…

Thanks for the reply, it didn’t work unfortunately. I did fix it in the end by just deleting all my CFG files and setting everything up again from scratch. Very strange.

try to update to latest Mesen (if its already available) I think dev updated something related to FDS