Hi all,
I am trying out ortotropic materials in a big assembly model that I am building. The problem is, when I try to solve a simple analysis using in some part an ortotropic material, I get the follwing error:

I have tried to chance the solution settings on this part, make it more refine and nothing work. Furthermore I can not suppress this part, since it is fundamental for my analysis. Any help please?
Kind regards,
Rafa