chdman: extracthd: unsupported CHD version or unknown file system
For (bash script):
chdman extracthd -i "input_file.chd" -o "output_file.iso" If you have a file named Final Fantasy VII.chd in the folder, you would type: convert chd to iso
chdman createcd -i "input.iso" -o "output.chd" For BIN/CUE: chdman: extracthd: unsupported CHD version or unknown file