What happens if you have 2 KSP's open?

[2001kraft]

What happens if I install 2 KSP's and run them simultaneously, the same save? Will I be able to control a craft in window one, and track it in window two? Will I be able to set up a collision by pausing the game on window one, setting up window two, pausing window two, setting up window one, and then unpausing window two and looking at magic in action? What will I see if one vessel is paused and I'm controlling the unpaused vessel? EXPERIMENTS! SCIENCE!

Edited June 26, 2015 by 2001kraft

[Crzyrndm]

Saves are separate objects in memory, event if they both write to the same location. Probably, the only interaction will be on entering the space centre when the last save written to file will be loaded

[Guest]

Your computer will melt. Not just melt, but china-syndrome melt.

[Magniff]

One KSP will run in one window

and an entirely unrelated KSP will run in an other window.

(In case you don't have enough RAM they will crash very quickly)

No spooky self stalking and no exploding universe.

[2001kraft]

Oh. That makes me disappointed. Shame on you, KSP!

[DeMatt]

Would you rather have it that KSP instances be separate, or would you rather have it that your web browser starts using your word processor's memory to store graphics information - overwriting your geography report with Amazon ad code?

[2001kraft]

^ lol.

[2001kraft]

I sadly cannot test because not enough RAM.

When I tried doing it my computer just instantaneously crashed. Thus, I will trust all of the smarter people, and declare this thread Answered. Good game everybody, good game indeed.

[Red Iron Crown]

You get to fully utilize two of your CPU's cores. /LowBlow

More seriously, you can run two instances of KSP simultaneously, in fact there was a mod that allowed map view and vessel view simultaneously on two monitors that used two instances of KSP to make it work. Having both working on the same save is likely a bad idea, though.

Edited June 26, 2015 by Red Iron Crown
Typo

[Ferdoni]

What actually happens is that if you are playing in 'the first' KSP 'the second' KSP will detect that you are playing in the first one.

Then the second KSP will get very jealous and start planning on murdering you. But since the fact that a computerprogram can't kill you, it will search for another way to hurt you badly.

It then goes to your KSP directory and all you related files (Dropbox etc.) to secretly manipulate them (suddenly dissapearing/exploding ships, routing Kerbals, hostile planets and way more things you don't want to happen). After around a week of frustrated gaming, all your savegames are deleted... In this way you are so incredible frustrated that you punch the computer screen, creating a dangerous electric shortcut, killing you instantly...

Conclusion, do not run two KSP's at the same time!

[tutike2000]

You can probably start two instances, but what you do in one instance will not happen in the second.

So if you launch a craft in instance A, you won't see it on the map in instance B.

When one of the instances saves the game, it overwrites/erases whatever the other instance saved.