Here are where vars are defined:
Here's the problemo. I get the undefined typed error for each like that has "W.saved_" How do I fix it?
var/savefile/F = new ("AO/Map.sav")
F["Builtstuff"] << built
for(var/obj/items/W in world)
Here's a screenshot for your convenience: http://i.gyazo.com/0dc3fd7cf355ff91d3813bb20087f926.png