# Issue to define FE space of MeshS type **URL:** \ **Category:** General Discussion\ **Created:** [February 17, 2022, 1:52pm UTC](https://community.freefem.org/t/issue-to-define-fe-space-of-meshs-type/1504 "2022-02-17T13:52:56Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![Loic](https://avatars.discourse-cdn.com/v4/letter/l/e9c0ed/32.png) [@Loic](https://community.freefem.org/u/Loic)\ **Post date:** [February 18, 2022, 9:52am UTC](https://community.freefem.org/t/issue-to-define-fe-space-of-meshs-type/1504/2 "2022-02-18T09:52:33Z")
For more precisions, This FE space `VH=fespace(P0)` works well, but this FE space `VH=fespace([P0])` does not work. It makes me think at the problem: > [@Error assembling a matrix 3d surface mesh](https://community.freefem.org/t/error-assembling-a-matrix-3d-surface-mesh/325): > > Hello, I came across a segmentation fault when trying to get a matrix from varf when using a 3d surface mesh. The following code gives the error, using the torus given as example in the doc. I have tried with both FreeFem++4.5 and the recent 4.6. Any ideas on how to solve this ? Thank you. load"msh3" real R = 3, r=1; … but I am on version 4.9. Loïc, --- _[View the full topic](https://community.freefem.org/t/issue-to-define-fe-space-of-meshs-type/1504)._