Some scenarios fail to load about openrct2

[tsunamistate]

The original RCT2 (at least my GOG version) gets the error Unable to load file, Missing Object Data when loading the same scenarios, so I suspect the problem is with the RCT2 installation itself.

[tsunamistate]

Here's the error from original RCT2, when loading Roaring Twenties - Prison Island

[lnz]

I believe this is related to the expansion packs and some initialization missing.
If I first load one of the working scenarios (e.g. Crazy Castle), then quit back to the title screen and then try one of the broken crashing ones I get an error message similar to tsunamistate's post:
They always seem to complain about missing expansion pack for me(which is possible as those functions are partly taken out of the code atm).

I'm also using the GOG version.

[IntelOrca]

When loading a saved game or quitting back to the title screen, the original window code is executed (which leads to lots of other original code being executed instead of the new OpenRCT2 code). This will be the case until do_game_command is written.

[duncanspumpkin]

I don't think this bug happens any more.