For anyone who had the "unexpected file error" issue for the files, and you know for sure there isnt any missing parts. make sure all the files have the
exact same name (other than the .001, .002, 003, etc..) For example, I had the same problem because one of the sites I downloaded the split files from renamed the file and removed the underscore in it. so I just renamed the file that didnt have an underscore to match the rest of the files.
EXAMPLE:
"I changed COM3D2EN.7z.004" to "COM3D2_EN.7z.004" to match the other files names"
Wrongly named file.
View attachment 4298765
Corrected.
View attachment 4298767