# Is anyone able to mesh this? **URL:** \ **Category:** General Questions\ **Created:** [January 26, 2026, 1:51pm UTC](https://prepomax.discourse.group/t/is-anyone-able-to-mesh-this/3221 "2026-01-26T13:51:51Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![CosmoKramer](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/cosmokramer/32/6636_2.png) [@CosmoKramer](https://prepomax.discourse.group/u/CosmoKramer)\ **Post date:** [January 26, 2026, 1:51pm UTC](https://prepomax.discourse.group/t/is-anyone-able-to-mesh-this/3221/1 "2026-01-26T13:51:51Z")
(v2.4.0) I’m trying to mesh a model but getting an error for the “Insulation” part: “Mesh generation failed for part Insulation. Check the geometry and/or adjust the meshing parameters.” I recall facing a similar error with another equally large model, and I restarted the programme and closed all background processes, and it worked. I also did manage to mesh a smaller ‘sample’ of this model with no probs. Want to know if this is a hardware problem or if there’s something wrong with the geometry. ![MeshErrorInsulation_FullModel](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/7/7602546875a5e9bb9ad98188b211bf003fee7428.jpeg) ![MeshErrorInsulation_SampleModel](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/d/d24535a660ea1609dca40c4a45ae5251f030ff47.jpeg) The parts that I want to mesh are: InnerBlock, Slab, Insulation, OuterBlock (compound part), Cladding (compound part), and AnglesAndScrews (compound part). I’ve tried increasing the max size but that didn’t help. ![MeshErrorInsulation_MeshParameters](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/0/05a280733bbe4f9428cc2e0aba58536bfeaa423a.jpeg) Here’s the [PMX file](https://1drv.ms/u/c/eec7215cdc16258e/IQCEp6fK0uehTpUYdWVnIUsQAcdqYb9IDMwnjx9KKc4sEDw?e=kd4N18) – would appreciate any help on how to solve this. ---
**Author:** ![FEAnalyst](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/feanalyst/32/688_2.png) [@FEAnalyst](https://prepomax.discourse.group/u/FEAnalyst)\ **Post date:** [January 26, 2026, 2:30pm UTC](https://prepomax.discourse.group/t/is-anyone-able-to-mesh-this/3221/2 "2026-01-26T14:30:57Z")
The connection between the slot and the hole seems to be problematic: ![image](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/a/a0576cf9885df388dcf9954c77a3cd3fa85eda6b.png) ---
**Author:** ![ViV](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/viv/32/3262_2.png) [@ViV](https://prepomax.discourse.group/u/ViV)\ **Post date:** [January 26, 2026, 3:45pm UTC](https://prepomax.discourse.group/t/is-anyone-able-to-mesh-this/3221/3 "2026-01-26T15:45:42Z")
There is overlapping geometry in the **Insulation** part. After removal (I did not check the mesh quality). ![image](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/b/bd5491b1d398de169df1a74b6da295e21b600ef6.jpeg) Mesh part by part. [310.pmx](https://prepomax.discourse.group/uploads/short-url/ICt9m9czbFkPyBzynL4VMNSj8K.pmx) (1.3 MB) ---
**Author:** ![FEAnalyst](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/feanalyst/32/688_2.png) [@FEAnalyst](https://prepomax.discourse.group/u/FEAnalyst)\ **Post date:** [January 26, 2026, 3:56pm UTC](https://prepomax.discourse.group/t/is-anyone-able-to-mesh-this/3221/4 "2026-01-26T15:56:46Z")
That’s the slot I pointed out, but the question (for the OP, of course) is if it has to be modeled this way (or at all). ![image](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/1/10ae948311837d0e01fa34962997a9564cec45d5.png) There’s still another problem with this geometry, though - no cutout here: ![image](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/0/0ab69a89f462a7d8202a4dd1df57c71b0b40691f.png) ![image](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/7/7fc09cdf71fb0089eab94aea005d1d3dd29d3230.png) @CosmoKramer Please have a look at the Geometry validity and Geometry simplification chapters here (when it’s back online - I can’t access it now): [https://wiki.freecad.org/FEM\_Geometry\_Preparation\_and\_Meshing](https://wiki.freecad.org/FEM_Geometry_Preparation_and_Meshing) ---
**Author:** ![CosmoKramer](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/cosmokramer/32/6636_2.png) [@CosmoKramer](https://prepomax.discourse.group/u/CosmoKramer)\ **Post date:** [January 26, 2026, 6:57pm UTC](https://prepomax.discourse.group/t/is-anyone-able-to-mesh-this/3221/5 "2026-01-26T18:57:29Z")
Thanks @FEAnalyst and @ViV I finally figured out the root cause of this and why the mesh for the sample worked but that of the full model didn’t: I was using Compound in FreeCAD to repeatedly copy one group of objects (block+angles+screws+cladding). For some reason, PrePoMax wasn’t recognising some of the holes that these objects would have as a result of other objects penetrating them (one thing I love about PrePoMax is that, normally, it is able to ‘draw-up’ holes where there is penetration, without me having to do it manually). So instead of Compound I used BooleanFragments \> Standard (tried CompSolid and Separate but they weren’t as ‘clean’) and that did it. Here are some images and here’s the link to the fixed [PMX file](https://1drv.ms/u/c/eec7215cdc16258e/IQDXGpcyZDCCSaHe-SEuBYCaAejKKuzP8U3Zu3Lsb4xF_b4?e=NpjVbE). ![MeshOK_PrePoMaxMesh](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/3/3c6f0993e19efcd72524051375abc6de73a95ad8.jpeg) ![MeshOK_FreeCAD](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/1/166e7f0b15a753b7a65899c7de5545fc8eee32f5.jpeg)