When using an Ultimate 64 or a 1541 Ultimate cartridge, please use Save To Disk instead of Save To Cart as although the game reports the Save To Cart as successful, it doesn't actually save anything and you will lose progress.

I've updated the manual with the new in formation.

Update: I've investigated, and Ultimate 64 saves to RAM, so when the power is turned off, progress is lost. You can save the cartridge image back to storage, but this is saving just the original cartridge image, not including the save game area, so doesn't save progress. I can fix this problem, but the cartridge image would have to grow by 256K.