DEM mass inflow

Hello researcher, I am currently working on a simulation of particle packing and settling. The top of the model is set as a mass inflow, and the bottom as a mass outflow. However, when I tried to set the top of the model as the mass inflow, the system reported an error as fllow.

image

This is my bug report.

4_2025-10-29T222139.518293.zip (26.6 MB)

Your geometry is closed both at the inlet and outlet. I always recommend to check the mesh before running a simulation:

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