designcreation problems again

[Ragnarok-X]

Anyways, i isolated the problem. In the 220 kT design, once i delete the must have ability "weapon" and adjust the rest of the must have abilites it will work. The game will design this vehicle and build it just fine. So its definitly something about the weapons...but WHAT ?!! There is enough space left for at least 1 weapon (2 if you count the secondary) and the weapon family DOES exist.......i cant believe it. i`ve done so much AI editing and cant solve this problem...enough space, family exists and i even deleted the tech requirements for the weapon so its accessable immediatly...still it wont design it.
Any suggestions, please ?!