When creating the mesh 
, you get the error:
Solution
Diamonds needs a closed circumference to create a plate. If that is not the case, the plate definition is ‘broken’: you get an ‘invalid’ plate (or wall).
Diamonds (since version 2023) selects these invalid plates when you generate the mesh.
- Click ‘OK’ to close the message.
- Fix the invalid plate(s).
- Either you delete them and create them again
- Either you run the projection function on the circumference although this doesn’t always fix the issue.
