KLHarmon: OK, This is NUTS ! !
When you start the game and you want to open a saved game, do not click on PLAY RIVEN. Instead, press ALT, then click on FILE and then OPEN (which is not greyed out), the open your saved game file
If you click on PLAY RIVEN (which is the only on screen option I have) the game will start from the beginning, and the OPEN option will be greyed out. At this point you can click on NEW, get back to the beginning, and then click OPEN.
Stupid interface !
Namur: I'm new in here (this is my first post) having recently downloaded the three Myst games. I've been having problems with Riven freezing up and cannot seem to find a fix. I've been living with it and saving quite frequently. When I initially saved the game, I did "save as" and named the file "1.RVN". Whenever I quit the game and resume later, I open Riven, then go to the top of the screen and click to get the menu and say Open, then click my 1.RVN file. It's been working fine. But now it won't load. I tried doing what was suggested in this post (starting a new game, pressing Space bar to get past the opening, and then trying to open my game, but it still won't open. Did it somehow get corrupted? I guess I'll have to start over ;-(
I have Win 7, 64.
AH, now i get what was going on.
You were trying to load a game while a cutscene was playing, and that you can't do.
But if you press 'Play Riven' then press space a couple of times to skip the early logo and intro cutscenes then you'll be able to load just fine.
Anyway, you got it working and that's what really matters. Have fun.