Sinking of a floating body with STL format

Hi every one

I have a problem with the simulation of a floating body with an almost complex geometry. It is a cone-cylinder shape. The cone shape has a dimeter of 0.3 m and the height of 0.15 m, the dimension of the cylindrical upper part is 0.4 m height and 0.15 m radius and I used the particle distance of 1 cm. I draw the geometry in Freecad and based on its draft, I calculated the density and the total mass of the body. I tried two different ways to simulate it using DualSPHysics. At first, I used the density of the floating body and I obtained very bad results. Then I checked the XML file in _out folder and I realized that the program calculated the total mass of the floating body as for example 1 kg, while it should be 9 kg based on the geometry and its draft. Then I tried another way and it was using the "massbody" option, in this way the program exited after a few time steps with this error:

Error: some boundary particle was excluded

…..

some boundary particle exceeded the -Z limit (bottom limit) of the simulation domain.

Does anyone have an idea to fix this problem? The way I introduced the floating body to the program is as follows:

     <setmkbound mk="50" />

     <setdrawmode mode="solid"/>

     <drawfilestl file="ConeCylinder.stl" autofill="true">

     <drawmove x="4.5" y="0.5" z="0.7790"/>

     </drawfilestl>

<fillbox x="4.55" y="0.51" z="1">

<modefill>void</modefill>

<point x="4.35" y="0" z="0.779" />

<size x="0.3" y="1" z="0.6" />

</fillbox>

Regards

Kaveh