I also was unable to unpack a Makeitone file with makeitone. I got the
same errors reported in another thread. All those exceptions
and error messages.
The file i was trying to unpacked was named:
"Tommy James & the Shondels - Anthology[Makeitone].Mp3"
I changed the file to "test.mp3" and suddenly makeitone unpacked it just fine.
I'm sure the people here can fix this quickly, but until then, you have
this workaround.
Just change the name, unpack, and change back. Sometime our sources
for these files don't give us a choice on the original names.
Hope this helps.