| Error Message | Why it Happens | Fix | | :--- | :--- | :--- | | chdman: cannot open input file | You forgot to extract the ZIP. | Extract the contents first. | | Missing tracks in CUE | The CUE sheet points to the wrong filename or the ZIP had missing files. | Open the .cue in Notepad. Fix the .bin filenames to match exactly. | | Unsupported compression | You fed a .7z or .rar file to chdman. | Convert the archive to ZIP, then extract, or extract using 7-Zip first. | | Input file is not a CD image | You tried to convert a .nes or .smc file inside a ZIP. | CHD is for CD/DVD/HDD games only. Use .chd for PS1, Saturn, Dreamcast, PS2, Xbox 360. |
To convert a ZIP file, you must first unzip it to access the internal disc image (typically .iso , .bin/.cue , or .gdi ).
Yes, most Android emulators like (PS2) and DuckStation (PS1) support CHD, making it a great way to save limited storage on your phone. Should I convert NES or SNES ZIPs to CHD? Convert Zip To Chd
You will extract the ZIP file first, leaving you with the raw disc files.
(arcade CHDs):
@echo off for /r %%i in (*.cue, *.gdi, *.iso) do chdman createcd -i "%%i" -o "%%~dpni.chd" pause Use code with caution. Click . Set the "Save as type" dropdown to All Files ( . ) .
Before you convert your entire library, make sure your preferred emulator supports CHD. Most modern "cores" in RetroArch (like SwanStation, Beetle PSX HW, and Genesis Plus GX) support it natively. Standalone emulators like PCSX2 (PS2) and DuckStation (PS1) also work flawlessly with the format. | Error Message | Why it Happens |
Check this box if you want the tool to automatically delete the old ZIP files after a successful conversion. Only do this if you are confident and want to save space immediately. Otherwise, keep it unchecked to test your new files first. 3. Choose Your Compression Method NamDHC allows you to select the compression type.
If you collect clean "Redump" sets for preservation purposes, CHD is entirely lossless. You can use CHDMAN to reverse the process ( chdman extractcd ) at any time to rebuild the exact original BIN/CUE files with matching MD5 checksums. Conclusion | Open the
If you strictly prefer a visual interface where you can drag and drop files instead of launching batch scripts, is an excellent open-source graphical frontend for CHDMAN. Download NamDHC from its official GitHub repository.