Project64's core crashes when loading the City of Walkways I level. Every other level, it loads just fine. I have found no RDB fix for this, and changing your plugins won't help, either. You're only bypass for this is to use a different emulator and transfer your mempak save to that emulator. Mupen64 and 1964 should work just fine, but if you use Nemu64, you may or may not be able to load your mempak data.