There Was An Unhandled Exception Trying To Save Your Rom To Disk May 2026
To: Development TeamSubject: Bug Report: Unhandled Exception during ROM Disk Write 🚨 Issue Summary
: Do not attempt to overwrite the original base ROM or a previous randomized version. Instead, give the file a completely new name when clicking "Randomize (Save)". Move the Randomizer Folder : If the program is in a protected system folder (like C:\Program Files Always keep 10%+ free space on your emulation drive
- Always keep 10%+ free space on your emulation drive.
- Store ROMs and saves in your user folder, never in Program Files or system roots.
- Exclude your emulator folder from real-time antivirus scans (set folder exclusions).
- Use a dedicated save folder backed up separately from ROMs.
- Avoid running the emulator from a network drive or USB stick (unless it’s high-speed and stable).
- Regularly update your emulator, but keep a known-stable version as backup.
- Do not force-close the emulator during save operations.
Part 1: Understanding the Error
What Does "Unhandled Exception" Mean?
In software development, an "exception" is an unexpected event that disrupts the normal flow of a program. An unhandled exception means the emulator encountered a problem it didn’t know how to recover from—so it stopped what it was doing and showed you an error. Part 1: Understanding the Error What Does "Unhandled
7. Prevention Measures
- Add unit tests for save routine with mocked file system failures.
- Use
FileStreamwithFileShare.Noneto detect locks early. - Run permission checks at app startup for default save directories.
- Log all save failures with stack traces for debugging.
The exception hadn't just crashed the game; the game had crashed the room. the game had crashed the room.
- Go to Settings → Apps → Emulator → Permissions → Ensure Storage is allowed.
- Move the ROM/save folder from external SD card to internal storage (SD card permission models are problematic).
3. Root Cause Analysis (Likely Causes)
Based on common patterns, the unhandled exception may be due to one or more of the following:
6. Check the error details
- The full error message may include a line number or exception type (e.g.,
System.IO.IOException,UnauthorizedAccessException). That helps narrow it down. - Look in the emulator’s log file or console output.