# Problem import 3D file .msh **URL:** \ **Category:** General Discussion\ **Created:** [December 12, 2020, 5:12pm UTC](https://community.freefem.org/t/problem-import-3d-file-msh/684 "2020-12-12T17:12:10Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![chaimaa](https://avatars.discourse-cdn.com/v4/letter/c/c0e974/32.png) [@chaimaa](https://community.freefem.org/u/chaimaa)\ **Post date:** [December 12, 2020, 5:12pm UTC](https://community.freefem.org/t/problem-import-3d-file-msh/684/1 "2020-12-12T17:12:10Z")
hello, i’m trying to import 3D mesh from gmsh by using: load"gmsh" mesh3 Th=gmshload3(“Part1.msh”); plot(Th,cmm=“Th mesh read from GMSH”,wait=1); savemesh(Th,“Th3.mesh”); but it give me : edges in 3D mesh are not considered yet in freefem++, skeep data Element of type 0 is not considered in Freefem++ can you help me to overcome this problem? ---
**Author:** ![prj](https://avatars.discourse-cdn.com/v4/letter/p/ecae2f/32.png) [@prj](https://community.freefem.org/u/prj)\ **Post date:** [December 13, 2020, 8:41am UTC](https://community.freefem.org/t/problem-import-3d-file-msh/684/2 "2020-12-13T08:41:35Z")
We can’t help you without the `.geo` and how you generate your `.mesh`. My guess is that you exported all the physical entities, which is not needed. Also, I think this is mostly a warning, is your `Th3.mesh` actually wrong? What gives `ffmedit Th3.mesh`? ---
**Author:** ![chaimaa](https://avatars.discourse-cdn.com/v4/letter/c/c0e974/32.png) [@chaimaa](https://community.freefem.org/u/chaimaa)\ **Post date:** [December 13, 2020, 4:46pm UTC](https://community.freefem.org/t/problem-import-3d-file-msh/684/3 "2020-12-13T16:46:04Z")
Thank you for your response . in order to import .msh file from gmsh to freefeem++ I do the folowing steps : 1- i open the .stp file in gmsh 2- i add volume in physical groups, and i create .geo file : Merge “Part1.stp”; Physical Volume(1) = {1}; 3-i generate 3D mesh 4- i export a .msh file 5- i create .edp file wich contain: load"gmsh" mesh3 Th=gmshload3(“Part1.msh”); plot(Th,cmm=“Th mesh read from GMSH”,wait=1); savemesh(Th,“Th3.mesh”); and i open it with freefem++ and i received this error : You chose the file “C:\Users\chaim\Desktop\test3.txt” – FreeFem++ v4.7 (Fri, Sep 04, 2020 1:37:14 AM - git v4.7-2-g3716c303) Load: lg\_fem lg\_mesh lg\_mesh3 eigenvalue 1 : load"gmsh"(load: loadLibary C:\Program Files (x86)\FreeFem++\.\gmsh = 0) 2 : mesh3 Th=gmshload3(“Part1.msh”); 3 : plot(Th,cmm=“Th mesh read from GMSH”,wait=1); 4 : savemesh(Th,“Th3.mesh”); 5 : sizestack + 1024 =1256 ( 232 ) edges in 3D mesh are not considered yet in freefem++, skeep data 0 tetrahedrons 0 triangles 1 numElements Return type false, your mesh is MeshS type, use gmshloadS function current line = 2 Assertion fail : (0) line :1037, in file gmsh.cpp Assertion fail : (0) line :1037, in file gmsh.cpp err code 6 , mpirank 0 try getConsole C:\Users\chaim\Desktop\test3.txt[test3.txt.log](https://community.freefem.org/uploads/short-url/9kqeD1cEgeyj4PMhUNL8GunjPjv.log) (826 Bytes)[docs.rar](https://community.freefem.org/uploads/short-url/uezcTx6GkJBGJxGnVuKQYQNR9gp.rar) (11.4 KB) ---
**Author:** ![prj](https://avatars.discourse-cdn.com/v4/letter/p/ecae2f/32.png) [@prj](https://community.freefem.org/u/prj)\ **Post date:** [December 13, 2020, 4:48pm UTC](https://community.freefem.org/t/problem-import-3d-file-msh/684/4 "2020-12-13T16:48:12Z")
How do you export the `.msh` file? ---
**Author:** ![chaimaa](https://avatars.discourse-cdn.com/v4/letter/c/c0e974/32.png) [@chaimaa](https://community.freefem.org/u/chaimaa)\ **Post date:** [December 13, 2020, 4:55pm UTC](https://community.freefem.org/t/problem-import-3d-file-msh/684/5 "2020-12-13T16:55:07Z")
i do just :file–\> export–\> .msh extension ---
**Author:** ![prj](https://avatars.discourse-cdn.com/v4/letter/p/ecae2f/32.png) [@prj](https://community.freefem.org/u/prj)\ **Post date:** [December 13, 2020, 4:58pm UTC](https://community.freefem.org/t/problem-import-3d-file-msh/684/6 "2020-12-13T16:58:14Z")
Are you using Gmsh format version 2 or version 4? ---
**Author:** ![chaimaa](https://avatars.discourse-cdn.com/v4/letter/c/c0e974/32.png) [@chaimaa](https://community.freefem.org/u/chaimaa)\ **Post date:** [December 13, 2020, 5:01pm UTC](https://community.freefem.org/t/problem-import-3d-file-msh/684/7 "2020-12-13T17:01:17Z")
i use gmsh version 4.6 ---
**Author:** ![prj](https://avatars.discourse-cdn.com/v4/letter/p/ecae2f/32.png) [@prj](https://community.freefem.org/u/prj)\ **Post date:** [December 13, 2020, 5:01pm UTC](https://community.freefem.org/t/problem-import-3d-file-msh/684/8 "2020-12-13T17:01:59Z")
You are not answering my question. Are you exporting the `.msh` using Gmsh format version 2 or version 4? Edit: I see from your attached file that you are using format version 4. You need to switch to format version 2. ```auto $ more Part1.msh $MeshFormat 4.1 0 8 [...] ``` ---
**Author:** ![chaimaa](https://avatars.discourse-cdn.com/v4/letter/c/c0e974/32.png) [@chaimaa](https://community.freefem.org/u/chaimaa)\ **Post date:** [December 13, 2020, 5:06pm UTC](https://community.freefem.org/t/problem-import-3d-file-msh/684/9 "2020-12-13T17:06:48Z")
thank you fror your help. it works now. ---
**Author:** ![prj](https://avatars.discourse-cdn.com/v4/letter/p/ecae2f/32.png) [@prj](https://community.freefem.org/u/prj)\ **Post date:** [December 13, 2020, 5:14pm UTC](https://community.freefem.org/t/problem-import-3d-file-msh/684/10 "2020-12-13T17:14:28Z")
Use `Export` instead of `Save Mesh`.