Warning with Gmsh, with ver 0.17 FEM: Error even with calculation

[atakebones]

I tried on win10 64bit, but warning of Gmsh
Warning: Surface mesh: worst distortion = -1.09168 (avg = 0.977715, 8 elements with jac.

  I can calculate it.
* ERROR in e_c3d: nonpositive jacobian
determinant in element 31324
* ERROR in e_c3d: nonpositive jacobian
determinant in element 31392
* ERROR in e_c3d: nonpositive jacobian
determinant in element 31392
Factoring the system of equations using the symmetric spools solver
Using up to 1 cpu (s) for spooles.
15.0: CalculiX done!
15.2: Loading result sets ...
And no result comes out,
If you know the solution, please tell me.
By the way, it doesn't work well with NetGen because it is thin.

[Jee-Bee]

Calculix breaks(read stop calculation) with negative jacobian...

I guess this happens a lot. Best it to decrease the meshsize (locally where the negative jacobians are) till the message about the negative jacobian isn't throwed anymore. Than the calculation will finish

[Jee-Bee]

I saw that you are using 0.17. It is better to use at least 0.18. Using the development version (0.19) would be better for using FEM.

[bernd]

Yeah, simple workaround is to decrease mesh size ! and yes use 0.18.2 or even better 0.19 version for FEM! see https://forum.freecadweb.org/viewtopic.php?f=18&t=12212