i have a 11.3(20) on my cisco 3640 and i upgraded it to 12.0(9). everything went fine while upgrading
it and i can even see the image in dir flash: but the router wont boot.
when i start it it says,
loadprog: error -on read during ELF program load
Excpected bytes 412345 and received 312345
boot: cannot load from "flash