Hello,
For some reason, there is a particular void that will not cut in one of my curtain wall families.
The void overlaps the element- and I can not work it out- I have succesfully done it for other scenarios but this one just seems to fail.
Please refer to image below and I have uploaded the family.
This is another example. but this is the glass element.
I can successfully cut the void anywhere the wall is located- but as soon as I lock it to a particular reference line (the one I want the element to be locked to)... the void can no longer cut- either side, to the side of this reference it works fine- just not on the reference.
This would be the result of the cut, but with the small prism penetrating the main geometry by a (very) small amount. Unfortunately your design is on the point where Revit will object. 
It looks like the issue occurs when you try and cut too small of a piece- as per the image.
As i have lots of instances of these and its parametrically driven, I cant account for all of them.
is there any work around?
