Hi @zabrielza, if you explode a VisualARQ object, like a beam, it will turn into a polysurface (actually, into an extrusion, in the case of beams)
This is not a bug. This is how objects with solids subtracted are displayed when they have their control points activated (control points on objects are automatically selected when you select one object only). There is a control point on the centroid of the volume used as a solid of subtraction, that can be used to move it. To do not see that auxiliary volume, just turn the beam control points off.
The best way to accomplish this is by duplicating the beam or column, exploding one of the copies, so it turns into a solid, and using it as a solid of subtraction on the other VisualARQ object, witht he vaSubtractSolids command. In future versions, we expect to detect intersections of beams with columns, slabs, walls, etc… so you don’ thave to do all this manual work.