Re: [Libmesh-users] Qusetion about Implmentation of Gmsh

[Roy S. <roy...@ic...>]

On Tue, 24 Apr 2018, 서승진 wrote:

>    ERROR: Finite element LAGRANGE on geometric element TRI3 only supports FEInterface::max_order =1, not fe_type.order = 2

TRI3 is a first-order geometric element, with only 3 nodes.

It sounds like you're trying to set up a second-order finite element
basis, which for LAGRANGE requires 6 nodes.

If that's the case, the easiest fix would be to call
mesh.all_second_order(), which would turn your 3-noded triangles into
6-noded triangles, before initializing your EquationSystems.
---
Roy