# Error generating quadratic mesh **URL:** \ **Category:** mesh\ **Created:** [April 25, 2022, 6:12pm UTC](https://fenicsproject.discourse.group/t/error-generating-quadratic-mesh/8150 "2022-04-25T18:12:33Z")\ **Posts on this page:** 1\ **Showing post:** 3
**Author:** ![jeannafta](https://yyz2.discourse-cdn.com/free1/user_avatar/fenicsproject.discourse.group/jeannafta/32/3563_2.png) [@jeannafta](https://fenicsproject.discourse.group/u/jeannafta)\ **Post date:** [April 26, 2022, 12:21pm UTC](https://fenicsproject.discourse.group/t/error-generating-quadratic-mesh/8150/3 "2022-04-26T12:21:48Z")
Thank you very much @dokken, it worked perfectly! I have another question that follows from this. If now I want to find the cell size of my quadratic elements, can I reuse the following code ([Evaluation of cell sizes](https://fenicsproject.discourse.group/t/evaluation-of-cell-sizes/6381))? ```auto tdim = mesh.topology.dim num_cells = mesh.topology.index_map(tdim).size_local h = dolfinx.cpp.mesh.h(mesh, tdim, range(num_cells)) print(h) ``` Because when I run it, it gives the following error: ```auto --------------------------------------------------------------------------- RuntimeError Traceback (most recent call last) Input In [14], in () 1 tdim = mesh.topology.dim 2 num_cells = mesh.topology.index_map(tdim).size_local ----> 3 h = dolfinx.cpp.mesh.h(mesh, tdim, range(2*num_cells)) 4 h_av = np.mean(h) RuntimeError: Incompatible dimension of arrays, compile in DEBUG for more info ``` Or is there a way to convert the quadratic mesh into a linear mesh directly from fenics, without having to re-generate a mesh on gmsh for example? Thanks again for all your help! --- _[View the full topic](https://fenicsproject.discourse.group/t/error-generating-quadratic-mesh/8150)._