There Was An | Unhandled Exception Trying To Save Your Rom To Disk

If these steps do not work, check the generated (usually saved as a .txt file in the randomizer's folder) for specific technical details like "No space left on device" or "Access is denied" to pinpoint the exact cause.

that typically occurs during the final "Randomize (Save)" step. The Frustration of the Save Failure

Heuristic detection in Windows Defender often flags ROM saving behaviors as potential malware because the software is injecting code into a binary file. Open the and type Windows Security .

referenced in the message (found in the same folder as the randomizer) for more technical details like java.io.IOException or finding a clean base ROM [Bug] Issue by 'Randomize (Save)' #771 - GitHub If these steps do not work, check the

: Create a dedicated folder directly on your drive root (e.g., C:\Emulators\ or C:\Games\ROMs ). Move all your emulators and game files into this folder. This grants the emulator unrestricted read and write access.

Sometimes, if you moved the emulator or a folder was renamed, the emulator is still looking for a file path that doesn’t exist. Go to the emulator settings menu. Locate or "Directories."

: Some versions of the randomizer struggle with newer Java environments. Solution : If you are using Java 17 or higher, try installing Java 8 instead, as many randomizers were built specifically for that environment. Open the and type Windows Security

The existing save file is corrupted, preventing the emulator from overwriting it.

or saving to a protected folder (like "Program Files") without administrator privileges. Storage Limitations : Large games like Pokémon Ultra Sun can require up to 6 GB of free space

for temporary files during the process; if the disk is full, the write operation fails. ROM Corruption or Incompatibility : Attempting to randomize a This grants the emulator unrestricted read and write access

: Try saving the randomized ROM to a simpler location, such as your Desktop or a new folder in your Documents . Avoid saving directly into "Program Files" or "C:" root, as Windows often restricts write access to these areas.

I can provide specific folder paths and config tweaks for your exact setup. Share public link

Ensure your target storage drive is not completely full.

Verify the file extension matches what your tool requires (e.g., .gbc , .gba , .nds , .smc ).

This guide covers the most common causes and provides step-by-step solutions to fix the issue.