As I understood the situation, a jump squad tried to retreat and got as retreat position a null pointer (NIL). Therefore the distance function which should have measured the distance between the current position and the retreat position crashed.
AI trace:
AI1002 10028 Skirmish Plan - Retreat
AI1002 10028 Skirmish - Avoid Enemies
AI1002 10028 Skirmish - Avoid Enemies
AI1002 10028 Jump
AI1002 10028 GetJumpPosition
AI1002 10028 Squad position = <-49.0:9.0:-123.0>
AI1002 10028 Plan state name is Retreating
AI1002 10028 Squad is going to position = nil
AI1002 10028 Assertion failed at utility.ai, line 106
Code part:
function SkirmishPlan:GetJumpPosition( squad_ai, last_pos )
aipushtrace("GetJumpPosition")
local squad_pos = squad_ai:GetPosition()
aitrace("Squad position = "..vec2str( squad_pos ))
local jump_dist = squad_ai:GetJumpDistance()
local variant = 15
local target = Vector3f()
local name = ( self:GetState() )
aitrace("Plan state name is "..name)
if name == "Heading to skirmish location" then
target = self.skirmish_attack_pos
else
target = self.retreat_pos
end
aitrace("Squad is going to position = "..vec2str( target ))
local dist_to_target = math.sqrt( distance_sqr( squad_pos, target ) ) <==== ERROR
I've included a nil check, and set the target position as source position if it's NIL again. But this is only an enmergency solution. I think the price question is why was the retreat position NIL? I saw that Flenser edited the file. Maybe he has an idea what could have caused the problem.
Debugging the skirmishplan.ai file wasn't really on my to-do list, but if you need help I can have a look, too of course. Although I want to finish the rework of the building orders, first...
