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

The error message "There was an unhandled exception trying to save your ROM to disk" is a critical failure typically associated with the Universal Pokemon Randomizer (UPR) or its modern fork, UPR-ZX. It indicates that the software encountered an unexpected problem while writing the modified ROM file to your storage. Common Causes

Phase 4: Disk & System Errors

7. Check Disk Space It sounds simple, but if your hard drive is full, the "unhandled exception" will trigger. The error message "There was an unhandled exception

3.1 File Access Permissions

• The application lacks write permission for the target directory.
• The file is marked as read-only.

6.3 Implement Retry Logic

• Allow retry with different path/permissions.
• Offer “Save As” automatically after failure.

Permission Issues: The application may lack the necessary Windows permissions to write files to the destination folder. The application lacks write permission for the target

If the error persists, check for an error log (usually a .txt file named error_[date]) in the randomizer's folder. This log contains technical details that can be shared on GitHub Issues for further assistance from developers. [Bug] Issue by 'Randomize (Save)' #771 - GitHub 6.3 Implement Retry Logic

• Instead of ePSXe → DuckStation
• Instead of ZSNES → Snes9x or bsnes
• Instead of VBA-M → mGBA

Update Java: Ensure you are running the latest version of Java 8 (x64), as outdated versions are a common source of unhandled exceptions in this tool.

Specific Game Bugs: Certain localized versions (e.g., German Black/White) had known bugs in older randomizer versions. Solution: Ensure you are using the latest version of the Universal Pokemon Randomizer ZX or use the English version of the ROM. Community Feedback