I want to convert station to ship and it says "Convert to ship is unavailable". But why?

Kirill Asanovich shared this feedback 21 months ago
Submitted

It would be great if you added a reason, because sometimes i can't understand.

I had a really good rocket, it was connected to base wich was on the ground, and i disconected the rocket. And rocket was just floating without support. And when i wanted to convert to ship, it says "Convert to ship is unavailable".