[ODE] QNAN in Body position! May be LCP problem? Need Help!!!

[Andrey Tyagunoff]

I create four wheels car with Hinge2 joints.
And I have heightmap custom geom for land.
After start the aplication all looks good, but some times my car
disappear. In this case dGetBodyPosition() return me QNANs!

If i set #define DEBUG_LCP I have message
"L*D*L' check, maximum difference = 4.7683716e-007"
If I trying use double in my config settings I have this message too.
What's wrong???