Thanks for replying to my post. After reading it I went back into the editor and tried again. I found that there is a bug/feature that won't let the tank rearm. What I had done was place a tank on the map and set the ammunition slider all the way left, that is, no ammunition. With the tank in that state there was no option to rearm even when the tank was right behind the ammo truck. The trick was to move the slider one small notch to the right. This gave the tank 1 round of heat. Then when I was behind the ammo truck the rearm option appeared as normal. So even though I would have preferred the tank completely empty of ammo to start with, I can live with it having just one round.
So I guess if you want to make a tank that can't be rearmed then just put the ammo slider all the way left.
Oh yes, and about the official doco for the editor being bad. I know that people have got by and struggled to make their own missions, but how much quicker the user base would have grown if Bohemia Interactive had put out a comprehensive editor guide. I'm sure I could winge for longer, but.
Bye for now.