Looking down the list of commands, I don't see one for Importing and Exporting buildings... or did I miss it?
Nevermind... found it..
after reading the Help files on the commands it looks like it's part of CoppisMod, which I think is my problem importing the buildings back in after I've edited the zombies in, Zombie 0.3, they never spawn and somethings get stripped from the import, one thing I seen was Letters, and Sign information in the past.. who knows what else on the Export/Import... just trying to rule out coppimod.. or maybe something I'm doing wrong configuring the zombie spawns in Zombie 0.3
Success! it works! seem coppismod was not importing all the important data that allows zombies to spawn.
https://7daystodie.com/forums/showthread.php?69772-djkrose-s-Scripting-Mod
That mod is my new best friend