Triggered attacks.. problem

I'm using a trigger that will make groups of spiders attack the player. It consists of attack-move orders for several groups (units in regions). The only problem is: some of the spiders just won't move, even though they are within the right region, while others of that same group do move. Since the groups are sort of queued, I can't afford disobedient spiders cos it will block the other groups later on..
So why don't they move?

I'm using: Order (units in Spiders1) to attack-move to (base).

why just not make the moving spiders a new group. I mean it would take a couple sec yes but at least there moving

Still the same.. actually causes more spiders to stand still.

here send me your map [email protected] and i shall look at it.

I guess some spiders can't find their ways out upon your attack order because it was too crowded, so they just stand still. Maybe you can try to recall the trigger periodically as long as there are still spiders in the region.

yes, i tried that, but to me that doesn't seem to be the problem because the other spiders that can't find their way out are moving, so if that's so they should be moving to i guess.. but thanx for checking anyway..

If anyone is into helping me, I'll send you the map. It's a simplified version of the actual problem. If you run it, the problem will be visible within a few seconds. Can anyone solve it????

Using that trigger will move a maximum of 12 units. If you have more, you want to use Unit Group - Pick every unit in Spiders1 and do Order (Picked Unit) to attack move tp (base).

thanx, that was the problem. I noticed the group did count more than 12 (by reporting the amount of units in group in the game), but only 12 were actually getting the order. It's solved this way so thx :)