Slitherine

Bru, Help please. Spawning units with transport. Infantry with half track or truck is fine swapping between the two modes but artillery stays in truck mode permanently.

You mean, when it's your turn, your artillery stays as a truck instead of a gun? That would be a new one on me. You should see the artillery in truck only when moving it, and for the rest of that turn. Look at it again; see if on the next turn, the artillery is out of the truck and ready to fire.

Oh, I know what the story might me. You may have inadvertently placed just a truck on the map instead of an artillery unit with a truck transport. They look the same when finished; I have done this myself at times. Follow this procedure carefully: