Face based void family will not cut one side

[jmartin]

So this has been bugging me for awhile. Revit will not place a nested void face based family on one of the 6 sides of a host family. The work around is to just create and constrain the void within the hosting family but this is more annoying than I can put into words. Any reason for this? I'm on LT 2023 atm but I think I tested in other versions with the same result. Attached sample family. Seems to work fine in project environment using a floor as host. didn't try other hosts.

[barthbradley]

Mirror the Top one in Elevation.  Easy peasy. 

[linkboy · Accepted solution]

Move the face of the family host geometry up not align with ref. level; don't break the constrain. You can put the family to 6 sides with no issue, except the bottom one need a flip.

[jmartin]

That is so bizarre. So long as that reference plane is 1/128" above the ref level it works. if its even or 1/256" it breaks. Thanks for the tweak. puts my mind at ease, but still seems like a bug. 

[jmartin]

thanks. this works too so long as there is an opposing face to mirror from. I did discover that after awhile. but really wanted to know if there was something in the family going on. It does seem related to the sketch place of the host object but that's about as far as I got.