Homebrew NES Virtual Console game help!!!!!

[djleviticus]

Hi all, i hope im posting this in the correct section.

I have purchased Mighty Bomb Jack from the eshop, and im trying to rip the game into a NES file to play on another emulator.

I've been using godmode9 to try and do this using this link https://glazedbelmont.github.io/vcextract/

Everything goes ok until i get to running the script in godmode9 then i get an error "unknown mapper format"

Does anybody know what im doing wrong????

cheers