# Failed to mesh with using Prepomax new Gmsh options

**URL:** <https://prepomax.discourse.group/t/failed-to-mesh-with-using-prepomax-new-gmsh-options/1222>\
**Category:** General Questions\
**Created:** [November 3, 2023, 12:13pm UTC](https://prepomax.discourse.group/t/failed-to-mesh-with-using-prepomax-new-gmsh-options/1222 "2023-11-03T12:13:55Z")\
**Posts on this page:** 2\
**Page:** 3

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**Author:** ![synt](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/synt/32/4658_2.png) [@synt](https://prepomax.discourse.group/u/synt)\
**Post date:** [November 17, 2024, 10:09pm UTC](https://prepomax.discourse.group/t/failed-to-mesh-with-using-prepomax-new-gmsh-options/1222/41 "2024-11-17T22:09:04Z")

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use basic setting to default uncheck or disable fit mid-side nodes to geometry,

 ![2024-11-18 05_04_38-](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/e/e0d00119738a3f7bfb59df0170db86cf4719479a.png)

this setting, also can eliminate distortion at mid-side nodes

 ![2024-11-18 05_28_10-PropertyGrid](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/5/567975ab4511943eceef260a76b458a2b9e78022.png)

 ![2024-11-18 05_30_27-](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/7/7b91bc9d2101b13780fed63cb34d12d46a2e9550.png)

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**Author:** ![Matej](https://avatars.discourse-cdn.com/v4/letter/m/a698b9/32.png) [@Matej](https://prepomax.discourse.group/u/Matej)\
**Post date:** [November 18, 2024, 5:08pm UTC](https://prepomax.discourse.group/t/failed-to-mesh-with-using-prepomax-new-gmsh-options/1222/42 "2024-11-18T17:08:08Z")

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I have extracted only the top surface of the middle part, and I can confirm that even using 2D meshing, there is a problem with projecting the mid-side nodes back to geometry when using the Quasi-structured quad algorithm. But not others.

I fail to see why this is so since the second-order elements are created only after the meshing is done, so projecting the mid-side nodes should be the same for all algorithms. Obviously, it is not.

 ![image](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/8/82763fa7b1082ecacf791f7b06563b3f01d92c0b.png)

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