How much graphics memory does your card have?
You might run low on graphics memory then.
Your program tries to create a graphics display, for which not enough graphics memory is available.
That might cause the problem too, I think.
I created a 3D maze program with default resolution of 1280x1024 and tried it on my friend's computer, he got the same error.
His graphics card couldn't handle that resolution.
Yours might handle it for one program, but not for 2 at once.
You can also try to run your space game at a lower resolution (i.e. 640x480) and run that twice.
If that works, then you're just low on vid-mem.
You might run low on graphics memory then.
Your program tries to create a graphics display, for which not enough graphics memory is available.
That might cause the problem too, I think.
I created a 3D maze program with default resolution of 1280x1024 and tried it on my friend's computer, he got the same error.
His graphics card couldn't handle that resolution.
Yours might handle it for one program, but not for 2 at once.
You can also try to run your space game at a lower resolution (i.e. 640x480) and run that twice.
If that works, then you're just low on vid-mem.