Fail to solve when setting certain number of vehicles

CuOpt fails to find a solution if the number of vehicles is set under 5 for the Homberger 200 r2_2_3 problem instance.

I tried running it with 1 sec limit, 30 sec limit and 300 sec limit. The fail always happens immediately.


Infeasible Solve.
NVIDIA cuOpt Failed to find a solution with status : 1

For Homberger 200 C1_2_2, it fails for 18 vehicles.