Thanks again XFlak. I reinstalled modmii in a simpler location, and the nand.bin extraction worked. I now have an EmuNAND named /nand/ on the directory of my SD card.Try a fresh modmii install, make sure it's a simple installation so avoid folders with weird symbols and stuff, just in case
If u keep getting the same error we can troubleshoot together so that if there's a change needed I can bugfix it for the next update.
Alternatively you can use showmiiwads to extract the nand, it's under the options or tools menu. Further, u can use showmiiwads to install WADs to an emunand, doesn't matter where they're saved. Change showmiiwads' view to showmiinand, point it to your emunand, then drag and drop wads onto the window, then whenever you're ready click the button at the bottom (should say install or something like that)
Can I use modmii to extract the wad files to the EmuNAND?











