I manually entered the same command that your bat file tried to run in elevated command prompt and got this error insteadA couple of things:
First, try simply opening it again TempNand, it might work a second time.
If that doesn't work, download the attached file and rename it from console ID.bat.txt to console ID.bat and put it in your TempNand folder. Then, drag the file you got from your DSi onto console ID.bat and tell me what happens