"Volume" Fill Mode Not Working for Horinzontal Tank (Cyliner with hemispherical ends) in DesignSPHysics

[rohith0698]

I'm trying to partially fill a horizontal tank in FreeCAD using DesignSPHysics. I tried the fillbox feature to partially fill the tank, but no fluid particles are generated in the case export—only boundaries appear. The expected result is a half-filled tank, but the fluid count is zero or extremely low (e.g., 9 particles).