var/list/hashstrings = list("alpha", "beta", "gamma", "delta", "release", "a", "b", "c", "d", "e", "f", "g", "h", "i")

Instance
    Map
        var
            hash
            swapmap/map

        New(_hash)
            if( !(_hash) ) hash =  pick(hashstrings) + pick(hashstrings) + pick(hashstrings) + pick(hashstrings)
            else hash = _hash
            map = new(_hash)
            map = SwapMaps_CreateFromTemplate(_hash)
            map.id = "[hash][pick(hashstrings)][pick(hashstrings)][pick(hashstrings)][pick(hashstrings)]"
            hash = map.id
            if(map)
                ..()

            else del src

        Del()
            var/swapmap/map = SwapMaps_Find(hash)
            if( map ) del map
            ..()

proc name: Read (/atom/Read)
  source file: SwapMaps.dm,490
  usr: the derfwer (/mob)
  src: Shinobi: Online (1,1,12) (/turf/player_barrier)
  call stack:
Shinobi: Online (1,1,12) (/turf/player_barrier): Read(C:\\Users\\Axerob\\Documents\\... (/savefile))
/swapmap (/swapmap): Read(C:\\Users\\Axerob\\Documents\\... (/savefile), /swapmap (/swapmap), null)
SwapMaps CreateFromTemplate("Slums")
Map (/Instance/Map): New("Slums")
Slums (/Instance/Slums): Action(the derfwer (/mob))
the derfwer (/mob): Do()
runtime error: Cannot create objects of type null.
proc name: Read (/swapmap/Read)
  source file: SwapMaps.dm,287
  usr: the derfwer (/mob)
  src: /swapmap (/swapmap)
  call stack:
/swapmap (/swapmap): Read(C:\\Users\\Axerob\\Documents\\... (/savefile), /swapmap (/swapmap), null)
SwapMaps CreateFromTemplate("Slums")
Map (/Instance/Map): New("Slums")
Slums (/Instance/Slums): Action(the derfwer (/mob))
the derfwer (/mob): Do()

    Read(savefile/S)
        var/list/l
        if(contents.len) l=contents
        ..() // this happens to be line 490, so this is probably directly related to the second error i have
        // if the icon was a text string, it would not have loaded properly
        // replace it from the cache list
        if(!icon && ("icon" in S.dir))
            var/ic
            S["icon"]>>ic
            if(istext(ic)) icon=swapmaps_iconcache[ic]
        if(l && contents!=l)
            contents+=l
            del(l)

    Read(savefile/S,_id,turf/locorner)
        var
            x;y;z;n
            list/areas
            area/defarea=locate(world.area)
        id=_id
        if(locorner)
            ischunk=1
            x1=locorner.x
            y1=locorner.y
            z1=locorner.z
        if(!defarea) defarea=new world.area
        if(!_id)
            //world << "New id"
            S["id"] >> id
        else
            var/dummy
            S["id"] >> dummy
            //world << dummy
        S["z"] >> z2        // these are depth,
        S["y"] >> y2        //           height,
        S["x"] >> x2        //           width
        S["areas"] >> areas
        locked=1
        AllocateSwapMap()   // adjust x1,y1,z1 - x2,y2,z2 coords
        //world << "successfully allocated map"
        var/oldcd=S.cd
        world << S.cd
        for(z=z1,z<=z2,++z)
            S.cd="[z-z1+1]"
            world << S.cd
            for(y=y1,y<=y2,++y)
                S.cd="[y-y1+1]"
                world << S.cd
                for(x=x1,x<=x2,++x)
                    S.cd="[x-x1+1]"
                    world << S.cd
                    var/tp
                    S["type"]>>tp
                    var/turf/T=locate(x,y,z)
                    T.loc.contents-=T
                    T=new tp(locate(x,y,z)) // this is the line which the runtime is occuring on
                    if("AREA" in S.dir)
                        S["AREA"]>>n
                        var/area/A=areas[n]
                        A.contents+=T
                    else defarea.contents+=T
                    // clear the turf
                    for(var/obj/O in T) del(O)
                    for(var/mob/M in T)
                        if(!M.key) del(M)
                        else M.loc=null
                    // finish the read
                    T.Read(S)
                    S.cd=".."
                    world << S.cd
                S.cd=".."
                world << S.cd
            sleep()
            S.cd=oldcd
            world << S.cd
        locked=0
        del(areas)