Uninstall ParkCleanup2, then reinstall, then "reset all settings" and try to open your park file again. If the .dat file is too large (I was struggling with anything over 50,000kb), it might just not work. I hadn't run into the particular error codes you were getting. This may sound like a stupid question, but is everything RCT3 related (at least that works when the game is running) installed on the E drive?
For instance, did you accidentally set the path for ParkCleanup to anything on the C drive, when the game runs on the E drive? Or is there scenery, particles effects or park files still installed on the C drive that aren't on the E drive? Like I said, stupid questions, but I never claimed to be a genius 😆
