When I run a BSP on My new map
it won't finish, and says it couldn't copy the file, because it couldn't be found.
I find this error in the bsp log...
"Placing detail props : 0..Error! Too many detail props emitted on this map!"
thing is I'm not using any props.

Any ideas?

detail props should mean detail brushes. Detail brushes are world brushes turned into entities for the sake of optimizing your map.

Basically... I think it means you have too many entities in your map.

Use the cordon tool to render parts of your map. Use this tool to reduce the number of entities in your render. If the map renders with most but not all the entities, then I am right.

Ahhh that makes sence.
Ok. I can fix that. I made My brush made sauser,
into a func_tractrain them made the stuff in it
into func_brush(s). then parented them to the sauser.
So if I take the stuff thats func_brush(s) and join them to the
sauser as a func_tracktrain it should fix the issue. I hope...
I also wanted to have a mounted gun on it too, that the player can use. Wanted to use a func_tanklaser. Would My sauser need to be a func_tanktrain to have a func_tanklaser on it? also is it possable to have the last path_track trigger a level change?