Help (Too many Supernovas)

[Buhite2]

So I'm playing a tabletop rpg that involves space and I'm trying to make a simulation of the star system the game is currently in, just for the heck of it. My first step is to build an O Class Blue Giant (class III, not II), but I'm stuck there. I pulled this off in the original universe sandbox, but I didn't have other functionality I was looking for so I dropped the project for a while and now I forgot how I did it.

When I picked it up again I find that my stars go super nova whenever I try and put the correct mass in. I even tried replicating Plaskett's Star (Specifically: HR 2422 A) and the same thing happened. I don't know if I'm doing something stupid or if its a bug, but can anyone help?

[gabriel.dac]

Yes, it is probably a bug. Supernovae are not well programmed, actually.

You can switch "realistic" off in the basic properties of the star so it won't go nova

[Evil_Tom]

I think the above posters suggestion to set 'realistic' to off is good for this.

Currently there are real life situations which are not represented by a 'realistic' star simulation. This may be because the tables of information that are used are incomplete or represent a set of 'normal' stars and not the extremes (which can often break our current understanding of stellar lifecycles.).
Due to the constraints on the average person computer you may find that not every eventuality can be simulated, but it is more important for them to get the most common situations covered, rather than the rarer and unusual ones.