I’m getting this error at t=0.4
Error: There exists a NORMAL particle in a GHOST cell.
Particle may have gone OUT-OF-BOUNDS.
To resolve this issue, please consider:
a) Verify all wall boundary conditions are defined
b) Reducing the value of the variable NEIGHBOR_SEARCH_N (Solids>DEM>Max steps between neighbor search)
c) Increasing the particle and/or wall stiffness (Solids>DEM>Normal spring constant or Young's modulus)
Current particle location (x, y, z coordinates): 0.6206E-01, 0.5063 , 0.2131E-01
Current particle velocity (u, v, w components) : -1.109 , 0.1710E-01, 102.5
Did you follow the suggestions in the error message?