# Contact Generations issue Shell\_Solid

**URL:** <https://prepomax.discourse.group/t/contact-generations-issue-shell-solid/981>\
**Category:** General Questions\
**Created:** [July 9, 2023, 1:38pm UTC](https://prepomax.discourse.group/t/contact-generations-issue-shell-solid/981 "2023-07-09T13:38:12Z")\
**Posts on this page:** 1\
**Showing post:** 16

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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:** [July 14, 2023, 10:48am UTC](https://prepomax.discourse.group/t/contact-generations-issue-shell-solid/981/16 "2023-07-14T10:48:05Z")

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> [@Agazzotti](#):
>
> but the compound fails and no mesh is generated. I can’t figure out how I can overcome the problem.

There is a limitation to meshing the compound parts. There should be no edges splitting the surface that end in the middle of the surface or edges that do not split the surface into 2 separated faces.

![image](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/c/cf86abeb5c73bee2399f746f132dfe00a6ae8727.png)

Figure 1: Unsupported face configurations

The face configurations in Figure 1 must be split into two separate faces in order for the Netgen mesher to be able to mesh them properly.

![image](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/d/d060909fbed394040a96759c846c524f578a59d5.png)

Figure 2: Supported face configurations

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