CSG Bodies not resolving boolean operations

[hsbBill]

Hi,

I am currently using the modelcontext to get to the shapegeometry (mesh). For the attached IFC model there are a number of elements with CSG bodies and it appears that these are failing to resolve the final shape with the ifcbooleanresult operations. The attached picture from xBimExplorer shows the issue with the walls failing to clip against the roof. I have tried using the very latest dll's and the issue is still there. I can confirm both BimVision and Solibri viewers do not have this issue.

Any help appreciated.

Many thanks

Bill Malcolm

CFGShareIssue.zip