Hello. I think the source volume was too large to fit on a pico8 cartridge.
Now I have reconfirmed that the above procedure works with pico8 0.2.5c and the latest pico-8_0.2.6b_windows.
Did you get any error messages while entering the command?
- Was the folder found on CD command? You will need to place the "dungeon_witches_p8cart" folder in the folder opened by entering the FOLDER command in pico8.
- Was the LOAD successful?
- Was the RUN successful?