GiD forum

Greetings,

I've been using GID to mesh a SAG mill (just surfaces, not volumes) and always get this same error when executing on LIGGGHTS:

Some elements with:
Mesh cad2: element id 146249 (line 1023745) has 6 neighs, but only 5 expected

And then it fails showing this:
ERROR on proc 0: Fix mesh: Bad mesh, cannot continue. Possibly corrupt elements with too many neighbors.
If you know what you're doing, you can try to change the definition of SurfaceMeshBase in tri_mesh.h and recompile (../surface_mesh_I.h:504)


I've already done a simulation without issues, but now this started, yet I've always have had this 6 neighs problem
If anyone could help me with a suggestion would be much appreciated.

Best regards.

These messages are raised by LIGGGHTS, not by GiD.
We don't know its meaning or the limitations of this code (6 triangles around a node is the most common pattern of a triangle mesh)

If the numeration of elements written for LIGGHTS is the same of GiD I recommend you to try to visually identify the problematic element 146249
(you can identify an element with Utilities->Signal->Elements)
and can list it with Utilities->List->Elements

Maybe you will see some unusual in this element.

Have a look also in yourLIGGGHTS calculation file, in the related line number 1023745, maybe something is wrong.