when i start the solver it give me this message ================================================== ==================== | Timestepping Information | ---------------------------------------------------------------------- | Timestep | RMS Courant Number | Max Courant Number | +----------------------+----------------------+----------------------+ | 1.0000E-01 | 0.00 | 0.00 | ---------------------------------------------------------------------- DOMAIN: Ingranaggio Reading mesh for map generation File read: C:\Mesh Deformabile\Meshes\Ingranaggio.0

DOMAIN: Ingranaggio File read: C:\Mesh Deformabile\Meshes\Ingranaggio.1

+--------------------------------------------------------------------+ | ERROR #002100012 has occurred in subroutine cVolSec. | | Message: | | A negative element volume has been detected. This is a fatal | | error and execution will be terminated. The location of the first | | negative volume is reported below. | | Volume : -0.8619E-07 | | Location : ( -0.10519E-02, 0.25736E-01, 0.47188E-02) | +--------------------------------------------------------------------+ +--------------------------------------------------------------------+ | ****** Notice ****** | | 70731 flat tetrahedral elements have been detected in | | element set 1 of the domain | | Ingranaggio. | | The coordinates of one of the elements are | | ( 0.2028E-02, 0.2732E-02, -0.1856E-01 ). | | If you experience robustness or accuracy problems, consider | | improving the mesh. | +--------------------------------------------------------------------+ what does it means?

Check your mesh. You have some poor quality elements at location ( -0.10519E-02, 0.25736E-01, 0.47188E-02)

Consider improving your mesh quality first.