I'm having the same issue, I followed all the instructions carefully up to this point but am receiving the same error message on step 9 when I try to put sysUpdater.cia onto the SD card.
May I have some help? I followed this guide and part 2 of his tutorial and was able to successfully add rxTools to my old3ds as shown in his tutorial. My old3ds version is 6.3.0-12U and I am trying to get it to version 9.0 or 9.2 so that I can use Pokemon injections.
I was wondering where...