Hello.  i am new to map making and my map is a mess and idk why.  First off all, I kept on getting errors such as cannot findmaps/_zombiemode_utility.gsc.  I got about 15 errors, each in the format _zombiemode_...  I fixed that by going into my map csv file and typing rawfile,maps/_zombiemode_utility.gsc for every file it said it could find.  Then I finally got into my map after an hour of doing that.  Then I walked around my map and could walk through the fences, which I made just like every other wall of my building and the walls are solid.  And finally, the grass texture only appears when I walk near it. 
Any help or tips would be appreciated!