Thanks Link.
I have double checked several times that the beams are excluded from the operation. Of note is that there are two (slightly vertically offset) meshes, each used as targets. Offsets are to artifically create roads in the topo model mesh. Also, we tried to setup view sets, but I guess one cannot save view sets in MOD files.
UPDATE: I added the beams as operators which fixes the issue. But in theory I shouldn't have had to add that extra step.
Thanks,
Scott
AC27 v. 4060 w/ MEP, Cadimage, Twinmotion 2023.2.2 using AC from AC6.0, 2021 MacPro M1 chip, Adobe CC. Used AC on both platforms.