Exit code -1 (0xffffffff)
Exit code -1 (0xffffffff) seems to be an incompatibility between the science application and your video card. You'll run into it when you use the graphics or screen saver, tasks running at the time when either is activated will error out with the above error message.
It's always good to report these errors on the project forums, especially when the project doesn't have graphics.
Mostly found on ATI video cards. Try updating your video card drivers and if you can, the DirectX version.
But the only sure workaround in case the project does have graphics is not to look at the graphics or to use the screen saver.
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