Problems with Mesh Pleasehelp

Hi Everyone,

I was wondering if someone can help me with the following problem I experience with mesh files:

I have created a mesh for my simulation using Freecad and I get the following error in the simulation run:

ERROR: Mesh cad1: The minumum angle of mesh element 330 (line 2312) is lower than the specified curvature. Increase mesh quality or decrease curvature (currently 0.000010°).

I have tried to decrease the curvature and even to increase the quality of the mesh but I still get the same error.I was wondering what software you guys use to create the best mesh for liggghts simulation or if you could kindly give me some advise of how I can solve this problem.

thanks in advance for your help.