# Meshing error in Pre-tension - Bolt **URL:** \ **Category:** Bug Reports\ **Created:** [October 15, 2025, 10:35am UTC](https://prepomax.discourse.group/t/meshing-error-in-pre-tension-bolt/3018 "2025-10-15T10:35:50Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![alexsepnov](https://avatars.discourse-cdn.com/v4/letter/a/e0b2c6/32.png) [@alexsepnov](https://prepomax.discourse.group/u/alexsepnov)\ **Post date:** [October 15, 2025, 10:35am UTC](https://prepomax.discourse.group/t/meshing-error-in-pre-tension-bolt/3018/1 "2025-10-15T10:35:50Z")
Hi all, I am learning PPM using PPM 2.4.0. Recently i tried to re-create the demo of Pre-tension - Bolt [PrePoMax & CalculiX - Pre-tension - Bolt](https://www.youtube.com/watch?v=7ucoBTqCcWE) however i cannot get pass from meshing. it always showed meshing error though i tried to adjust the PPM 2.4.0 setting to the tutorial, i.e. turning off second order. is there something changing from the tutorial, e.g. the stp file? [plate\_bolt\_pretension.pmx](https://prepomax.discourse.group/uploads/short-url/6Ux4K23TH1AXRsNS2zkiTDrntNi.pmx) (532.2 KB) ---
**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:** [October 15, 2025, 11:03am UTC](https://prepomax.discourse.group/t/meshing-error-in-pre-tension-bolt/3018/3 "2025-10-15T11:03:17Z")
Indeed meshers report intersections of some surfaces. Try meshing only the bolt segments for now, then you can connect the plates to them via tie constraints. ---
**Author:** ![Matej](https://avatars.discourse-cdn.com/v4/letter/m/a698b9/32.png) [@Matej](https://prepomax.discourse.group/u/Matej)\ **Post date:** [October 15, 2025, 1:46pm UTC](https://prepomax.discourse.group/t/meshing-error-in-pre-tension-bolt/3018/4 "2025-10-15T13:46:05Z")
It seems something is different, but I will have to find the problem. ---
**Author:** ![Matej](https://avatars.discourse-cdn.com/v4/letter/m/a698b9/32.png) [@Matej](https://prepomax.discourse.group/u/Matej)\ **Post date:** [January 18, 2026, 5:46pm UTC](https://prepomax.discourse.group/t/meshing-error-in-pre-tension-bolt/3018/5 "2026-01-18T17:46:54Z")
I cannot find the problem in PrePoMax. I updated the Open CASCADE version (geometry kernel) in between, and I think this is the reason the model fails to mesh after compounding. I am waiting for the new Open CASCADE version 8 to integrate it. Maybe it will be improved. In the meantime I will change the model. ---
**Author:** ![Matej](https://avatars.discourse-cdn.com/v4/letter/m/a698b9/32.png) [@Matej](https://prepomax.discourse.group/u/Matej)\ **Post date:** [January 18, 2026, 6:08pm UTC](https://prepomax.discourse.group/t/meshing-error-in-pre-tension-bolt/3018/6 "2026-01-18T18:08:36Z")