Thanks , that really helped!
I’m still having issues with the scale or layout of the textures on the maps when imported but it seems UE4 no longer has a problem with the light map side of things.
I followed that video to the T except added a join function found in another tutorial to map the building as one entity. When checking out the original model in blender it shows that it has a list of maps but no content in them (below)
So I tried several variations; selecting one of the existing and adding maps, deleting all and adding two new with variations in adding maps to both channels or one only and so on…
I seem to get the model into UE4 and build ok but the materials are now wonky. (below)
I have tried to research a solution to this and tried several variations before responding hoping to have a ‘mission accomplished’ post but no luck.
Any thoughts?