Yes, I got this error with download/wit-v3.02a-r7679-x86_64.tar.gz
you may want to reupload a fixed version.
[lol@lolilou bin]$ ./wit DUMP ~/dev/fpga/Resident\ Evil\ \(Europe\)\ \(En\,Fr\,De\,Es\,It\)\ \(Disc\ 1\).iso
!! wit: ERROR #126 [FATAL ERROR] in wd_read_part() @...