My Parts or kerbals dissapear when I seperate them or eva!

[OneSmallStepForKerbal]

I'm having a problem where when I separate objects or eva kerbals, they disappear! I tried Uninstalling and reinstalling, but it doesn't help!

[Tex_NL]

Need more info.

Are they just not visible on the map? Are they catapulted out of the solar system? Do they just go poof?

At this point it's just a guessing game. For a proper answer we need more info.

[OneSmallStepForKerbal]

No, they don't go poof, not they don't get catapulted

[DrLicor]

When in atmosphere, and flying. You have a physic range of 2,5km I believe. Every (active) object that gets out of that range and is on a crash trajectory with the planet. Will eventually disappear when hitting the ground. This is because KSP won't calculate any physics beyond this range.

There are several mods to counter this. One is FRMS. So you can jump back to the separation of any stage/part.

 

If this situation doesn't apply to yours. Please provide us with some logs.