Error Message when spawning vehicle.

I am making a SWEP which spawns a vehicle which I have attempted to create. When spawning the vehicle directly from the menu it works fine however from the SWEP this error message appears:
Engine Error
vdisp_000 (2) at in contact with models/military2/air/recognizer.mdl
(2) at, crash.dist = -1, minq = 99999999999999980000000000000000000000000000000000000

Just so you know the bit after ‘minq’ isnt entirely accuarte but there were many repeats of the digits i have put.
Any ideas on what this is or how to fix it. This is the code where the problem is as it all works fine until i put this bit into the lua.
function SWEP:SecondaryAttack()

    local trace = self.Owner:GetEyeTrace()
                local vehicle = ents.Create("prop_vehicle_jeep")
                vehicle:SetPos((trace.HitPos) + Vector (0, 70, 0) ) 

Use the [lua] Tags.