NPC behavior

[Professor Lamme.]

i know how to make your npc have dual pistols:

 

set his weapon: WEAPON_BLASTER_PISTOL

Set is rank: Itcomm

 

The only problem is that when i attack him the game sends me back to the main menu with and error that i cant remember what it is. If you can figure out a way to fix this then you'll get a functional dual-wielding pistols npc