I want to create 10000 solid rigid particles in DEM-SPH using drawsphere command. If I set these 10000 sphere the same mk, they are resting and can not move during simulation. If I set them different mk, the number of the mk is not enough, because the maximum mkconfig boundcount is 240. How can I create 10000 solid spheres in DEM-SPH simulation? Can I adjust the maximum mkconfig boundcount to 10000000? And where can I adjust it?