The "unhandled exception" error almost always points to a problem between the emulator and your storage system. Below are the most frequent triggers:
What to do if it’s an application bug
There’s something perversely human about error messages — they arrive at the exact moment your confidence peaks, in stark, monospace font, and they demand a reaction. “There was an unhandled exception trying to save your ROM to disk.” Short, sterile, and devastatingly specific. It’s the software equivalent of finding your passport stuck in the washing machine. The "unhandled exception" error almost always points to
If you're on Windows, try running the randomizer "As Administrator" to bypass folder permission restrictions.
"THERE WAS AN UNHANDLED EXCEPTION TRYING TO SAVE YOUR ROM TO DISK." It’s the software equivalent of finding your passport
Set your emulator to save in a dedicated, local folder, not a network drive or cloud drive.
An "unhandled exception" is a generic software term. It means the program encountered an unexpected condition that it did not know how to handle, leading to a crash or a halted process. When trying to save a ROM to disk, this specific exception is usually triggered by one of the following factors: An "unhandled exception" is a generic software term
This is arguably the most frequent cause. Your operating system may be preventing the software from writing to the disk. This can happen if:
Cloud services like OneDrive, iCloud, or Dropbox are actively syncing the save folder, locking the file while the emulator tries to write to it.
Solution 4: Disable Cloud Synchronization (OneDrive/Dropbox)