Spring RTS Engine

I have had several different units get stuck on the edge of the map. Since I've only played the game a couple of times, I'm guessing this is a common and known issue? If not, I can provide more useful detail to help narrow the search.

I know it was not a part of the original game, but might it be worth discussing a wall auto-build feature.


--You've seen the type, you draw a line, and the next in sequence is built once the first is completed...

It's just been toooo long since I've played this game. Can anybody help me to recall the tech tree / prequisites for some of the advanced vehicles?

I seem to recall the targeting facility being required for ...something... and then you needed to build ...um...