If I open the BigCavernRanch files in xtherion and then look at the boxes for survey structure and map structure, they are completely empty.
You may see that structure only after successful compilation.
I tried creating a map statement in the BigCavernRanch .th file which mentioned the four main maps, then doing a "select" on that map in the thconfig. That produced errors saying that objects did not exist.
What will happen if you try select only AllieMainPlan in your thconfig? Map „AllieMainPlan" is a part of the "all“ name-space so it should work.
Just a note: in such complicated projects I prefer to use extensions for names of surveys, scraps, maps, for example
map AllieMainPlan.map
scrap Entrance1.scrap
survey all.survey
Names of objects are a bit longer, but later it is clear, what the name of object means.
Martin