catch (Exception ex) when (ex is IOException or UnauthorizedAccessException)
If the standard steps do not work, the issue may lie within your system dependencies:
Many legacy programming tools struggle to read file paths that contain spaces, symbols, or non-English characters.
This guide provides a comprehensive breakdown of why this error happens and how to fix it quickly. Understanding the Error catch (Exception ex) when (ex is IOException or
Don't rely solely on one. Alternate between using the emulator’s "Save State" (Shift+F1) and the game's actual in-game save menu.
If your "Documents" folder (where saves are often kept) is synced to OneDrive:
The standard Universal Pokémon Randomizer has known compatibility issues with ROM hacks, which often alter core game data the randomizer relies on. The folder designated for save files or state
Do not run portable software tools out of your system downloads archive.
The folder designated for save files or state saves is set to "Read-Only" or has become corrupted. Step-by-Step Troubleshooting
Delete old files or switch the output target to an empty secondary drive. java.io.FileNotFoundException (Access is denied) catch (Exception ex) when (ex is IOException or
An "exception" in programming is an error that occurs during runtime. An "unhandled" exception means the emulator software did not know how to handle this specific error, so it passed the problem to the operating system (Windows), resulting in a crash or a failed save.
: C:\Users\[YourUsername]\Documents\Emulation Saves\
The "unhandled exception" error is usually a communication error between your emulator and Windows. In 90% of cases, or moving the save folder to a non-restricted directory will fix the problem immediately.