# Error reading Gmsh mesh in FreeFem++
**URL:** https://community.freefem.org/t/error-reading-gmsh-mesh-in-freefem/1416
**Category:** General Discussion
**Created:** [January 7, 2022, 1:02am UTC](https://community.freefem.org/t/error-reading-gmsh-mesh-in-freefem/1416 "2022-01-07T01:02:35Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@lukas](https://community.freefem.org/u/lukas)
#### Post date: [January 7, 2022, 1:02am UTC](https://community.freefem.org/t/error-reading-gmsh-mesh-in-freefem/1416/1 "2022-01-07T01:02:35Z")
Hi !
I have an error reading a Gmesh mesh in Freefem++
#FreeFem++ script:
load “gmsh”
mesh Th = gmshload(“mesh.msh”);
#FreeFem++ output:
**Element of type 5 is not considered in Freefem++**
#Gmsh .geo script:
Point(1)={0,0,0,0.1};
Point(2)={1,0,0,0.1};
Point(3)={1,8,0,0.1};
Point(4)={0,8,0,0.1};
Line(1)={1,2};
Line(2)={2,3};
Line(3)={3,4};
Line(4)={4,1};
Curve Loop(1) ={1,2,3,4};
Surface(1) = {1};
Rotate {{0, 0, 1}, {0,0,0}, -Pi/3} {
Surface{1};
}
Mesh 2;
---
### Author:  [@frederichecht](https://community.freefem.org/u/frederichecht)
#### Post date: [January 10, 2022, 5:43pm UTC](https://community.freefem.org/t/error-reading-gmsh-mesh-in-freefem/1416/2 "2022-01-10T17:43:56Z")
**Element of type 5 is not considered in Freefem++** is 8-node hexahedron
and no hexahedron in freefem.
---
### Author:  [@lukas](https://community.freefem.org/u/lukas)
#### Post date: [January 10, 2022, 7:11pm UTC](https://community.freefem.org/t/error-reading-gmsh-mesh-in-freefem/1416/3 "2022-01-10T19:11:52Z")
Thanks Frédéric !! It’s possible make a finite volume method on Freefem++ ??
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### Author:  [@frederichecht](https://community.freefem.org/u/frederichecht)
#### Post date: [January 11, 2022, 12:12pm UTC](https://community.freefem.org/t/error-reading-gmsh-mesh-in-freefem/1416/4 "2022-01-11T12:12:55Z")
Yes but to day is tricky.
---
### Author:  [@Aysha007](https://community.freefem.org/u/Aysha007)
#### Post date: [December 25, 2025, 3:48pm UTC](https://community.freefem.org/t/error-reading-gmsh-mesh-in-freefem/1416/5 "2025-12-25T15:48:52Z")
Hi,
I am getting warning like this when i try to load mesh exported from Gmsh, Warning: – Your set of boundary condition is incompatible with the mesh label.
Warning: – Your set of boundary condition is incompatible with the mesh label.
Warning: – Your set of boundary condition is incompatible with the mesh label.
Warning: – Your set of boundary condition is incompatible with the mesh label.
Warning: – Your set of boundary condition is incompatible with the mesh label.
load “gmsh”
real Lx = 100.0 \* d;
real Ly = 50.0 \* d;
border b1(t=0, Lx/2) {x=t; y=d; label=1;}
border b2(t=d, 0) {x=Lx/2; y=t; label=2;}
border b3(t=Lx/2, Lx) {x=t; y=0; label=3;}
border b4(t=0, Ly) {x=Lx; y=t; label=4;}
border b5(t=Lx, 0) {x=t; y=Ly; label=5;}
border b6(t=Ly, 0) {x=0; y=t; label=6;}
mesh Th = gmshload(“mesh3011.msh”);
boundary condition…
- on(1,3, u=0, v=0)
- on(2, u=Uj, v=0)
- on(4, u=-Uinf, v=0)
- on(5, v=0)
- on(6, p=0);
mesh3011.msh file looks like…
$MeshFormat
2.2 0 8
$EndMeshFormat
$PhysicalNames
6
1 1 “b1”
1 2 “b2”
1 3 “b3”
1 4 “b4”
1 5 “b5”
1 6 “b6”
$EndPhysicalNames
$Nodes
80782
1 0 0.0254 0
2 1.27 0.0254 0
3 1.27 0 0
4 3.81 0 0
5 3.81 1.27 0
6 0 1.27 0
7 0.009927406534577778 0.0254 0
8 0.01981601162725292 0.0254 0
9 0.0296659664128969 0.0254 0
---
### Author:  [@frederichecht](https://community.freefem.org/u/frederichecht)
#### Post date: [January 28, 2026, 10:28am UTC](https://community.freefem.org/t/error-reading-gmsh-mesh-in-freefem/1416/6 "2026-01-28T10:28:21Z")
Your get the list of labels in mesh this functions
int[int] lab=labels(Th);
to understand some thing.