Unable to save a level in Forge

[DeadYorick]

I seem to be unable to save a level in Forge. I've made a basic polygon with a player.
Is there something I need to do first?

[ravenshining]

Hm, I just tried duplicating that and it lets me save. However, this isn't a valid level, you must have at least 3 polygons.

[MADDmike]

However, this isn't a valid level, you must have at least 3 polygons.

That is not true, I have once made a map with just one polygon. The problem though will be in the playing of the map in marathon. Now I did this on a MacOS 9 on a real iMac but this should still be true in sheapshaver.

So to the problem what version of Sheapshaver and what version of Forge are you using?