# Folder cgx\_2.17/netgen not present **URL:** \ **Category:** CalculiX GraphiX\ **Created:** [November 9, 2020, 9:08am UTC](https://calculix.discourse.group/t/folder-cgx-2-17-netgen-not-present/291 "2020-11-09T09:08:35Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![CRTS](https://avatars.discourse-cdn.com/v4/letter/c/8491ac/32.png) [@CRTS](https://calculix.discourse.group/u/CRTS)\ **Post date:** [November 9, 2020, 9:08am UTC](https://calculix.discourse.group/t/folder-cgx-2-17-netgen-not-present/291/1 "2020-11-09T09:08:35Z")
I am following the [instructions](http://www.dhondt.de/cgx_2.17.INSTALL) to build cgx\_2.17. It says that I can additionally/alternatively build **ng\_vol** instead of the supplied **tetgen** because it allows tet-meshing with a target-element-size. Therefor, according to the instructions, a source file shall be replaced: > Replace the src file with the one located in the folder cgx\_2.17/netgen and build it in the netgen directory. However, there is no **cgx\_2.17/netgen** directory. Has **ng\_vol** become obsolete? ---
**Author:** ![xyont](https://yyz2.discourse-cdn.com/free1/user_avatar/calculix.discourse.group/xyont/32/3553_2.png) [@xyont](https://calculix.discourse.group/u/xyont)\ **Post date:** [November 12, 2020, 9:51am UTC](https://calculix.discourse.group/t/folder-cgx-2-17-netgen-not-present/291/2 "2020-11-12T09:51:19Z")
hi, interesting features were i also seeking for. especially in quadrangle dominate capabilities of Netgen. someone stored [CGX source codes](https://github.com/calculix/cgx_prool) at GitHub, seems right [ng\_vol.cpp](https://github.com/calculix/cgx_prool/blob/master/cgx_2.11/netgen/ng_vol.cpp) files did not available since 2.12 versions. i did not know the compatibility issues with latest version of CalculiX GraphiX, it need a try. best, ---
**Author:** ![klaus.wittig](https://avatars.discourse-cdn.com/v4/letter/k/4da419/32.png) [@klaus.wittig](https://calculix.discourse.group/u/klaus.wittig)\ **Post date:** [November 21, 2020, 4:25pm UTC](https://calculix.discourse.group/t/folder-cgx-2-17-netgen-not-present/291/3 "2020-11-21T16:25:18Z")
Tetgen supports a target-element-size out of the box. Only the netgen mesher would need an update. I include the netgen files in 2.18 again. ---
**Author:** ![rafal.brzegowy](https://avatars.discourse-cdn.com/v4/letter/r/a9adbd/32.png) [@rafal.brzegowy](https://calculix.discourse.group/u/rafal.brzegowy)\ **Post date:** [December 9, 2020, 6:03pm UTC](https://calculix.discourse.group/t/folder-cgx-2-17-netgen-not-present/291/4 "2020-12-09T18:03:05Z")
I add tetgen 1.6 packages to mingw from msys2: >