Help with mapper

"Run-time error
Plugin: AlterAeonMapper (called from world: Demonclient)
Function/Sub: mapper.mouseup_room called by Plugin AlterAeonMapper
Reason: Executing plugin AlterAeonMapper sub mapper.mouseup_room
DesktopMUSHclientluaaardmapper.lua:1187: attempt to call global 'findpath' (a nil value)
stack traceback:
DesktopMUSHclientluaaardmapper.lua:1187: in function 'full_find'
DesktopMUSHclientluaaardmapper.lua:1403: in function 'find'
DesktopMUSHclientluaaardmapper.lua:1556: in function DesktopMUSHclientluaaardmapper.lua:1536>"

Run-time error
Plugin: AlterAeonMapper (called from world: Demonclient)
Function/Sub: map_goto called by alias
Reason: processing alias ""
DesktopMUSHclientluaaardmapper.lua:1388: attempt to get length of local 'dests' (a nil value)
stack traceback:
DesktopMUSHclientluaaardmapper.lua:1388: in function 'find'
[string "Plugin: AlterAeonMapper"]:326: in function <[string "Plugin: AlterAeonMapper"]:312>

  mapper.init { config = config, get_room = get_room  }

   supplied_get_room = t.get_room
   assert (type (supplied_get_room) == "function", "No 'get_room' function supplied to mapper.")

  ["70409"] = {
    desc = "70409",
    area = "",
    fillcolour = 65280,
    fillbrush = 0,
    bordercolour = 16777215,
    name = "The Southern Road.",
    exits = {
      w = "70408",
      s = "70410",
      e = "0",
      },
    },

-- -----------------------------------------------------------------
-- Here on "Exits:" line ----- we have changed rooms
-- -----------------------------------------------------------------

function process_exits (exits_str)
  
  -- genereate a "room ID" by hashing the room name, description and exits

  -- break up exits into individual directions
  exits = {}
  
  for exit in string.gmatch (exits_str, "%w+") do
    local ex = valid_direction [exit]
    if ex then
      exits [ex] = "0"  -- don't know where it goes yet
    end -- if
  end -- for

  -- add to table if not known
  if not rooms [uid] then
   rooms [uid] = { name = name, desc = uid, exits = exits, area=area, fillcolour=terrain_color[terrain], fillbrush=0, bordercolour=0xffffff }
  end -- if

  -- save so we know current room later on  
  current_room = uid


  
  -- call mapper to draw this rom
  mapper.draw (uid)

  -- try to work out where previous room's exit led  
  if expected_exit == "0" and from_room then
    fix_up_exit ()
  end -- exit was wrong
    
end -- process_exits

 exits [ex] = "0"  -- don't know where it goes yet

select * from rooms;

if not rooms [uid] then
   rooms [uid] = { name = name, description = uid, exits = exits, area=area, fillcolour=terrain_color[terrain], fillbrush=0, bordercolour=0xffffff }

  current_room = uid

  local room = rooms [current_room]

if not room then
...
save_room_to_database

room = rooms [current_room]

  current_room = uid

if not rooms [uid] then
   rooms [uid] =  .... 

function process_exits (exits_str)

     -- generate a "room ID" by hashing the room name, description and exits
  -- break up exits into individual directions
  exits = {}
 for exit in string.gmatch (exits_str, "%w+") do
    local ex = valid_direction [exit]
    if ex then
      exits [ex] = "-666"  -- don't know where it goes yet
    end -- if
  end -- for
  if not rooms [current_room] then
   rooms [uid] = { name = name, roomdesc = uid, exits = exits, area=area, fillcolour=terrain_color[terrain], fillbrush=0, bordercolour=0xffffff }
  end -- if
  -- save so we know current room later on  
  current_room = uid


--  ColourNote ("rosybrown", "", roomdesc)
--  ColourNote ("olive", "", uid)
  
  local room = rooms [current_room]
  
  -- not cached - see if in database
  if not room then
    -- print ("Loading room", current_room, "from database")
    room = load_room_from_database (current_room)
  end -- not in cache
   
    
  
  if not room then
    -- print ("Added room", uid)  -- debugging
    -- print ("Name", name)
    -- ColourNote ("rosybrown", "", roomdesc)
     
    db:exec ("BEGIN TRANSACTION;") 	

    save_room_to_database (current_room, name, roomdesc)
    save_exits_to_database (current_room, exits)
    
    db:exec ("COMMIT;") 

    -- get it back now
    room = load_room_from_database (current_room)

  end -- if room not there
  
  -- call mapper to draw this rom
  mapper.draw (current_room)    -- redraw room with name

  -- try to work out where previous room's exit led  
  if expected_exit == "-666" and from_room then
    fix_up_exit ()
  end -- exit was wrong
  
end -- process_exits

 if not rooms [uid] then
rooms [uid] = { name = name, roomdesc = uid, exits = exits, area=area, fillcolour=terrain_color[terrain], fillbrush=0, bordercolour=0xffffff }

  if not rooms [current_room] then
   rooms [uid] = { name = name, roomdesc = uid, exits = exits, area=area, fillcolour=terrain_color[terrain], fillbrush=0, bordercolour=0xffffff }

    save_room_to_database (current_room, name, roomdesc)

function process_exits (exits_str)
     -- generate a "room ID" by hashing the room name, description and exits
  -- break up exits into individual directions
exits = {}
 for exit in string.gmatch (exits_str, "%w+") do
    local ex = valid_direction [exit]
    if ex then
      exits [ex] = "-666"  -- don't know where it goes yet
end -- if
  end -- for
  if not rooms [uid] then
rooms [uid] = {name = name, roomdesc = uid, exits = exits, area=area, fillcolour=terrain_color[terrain], fillbrush=0, bordercolour=0xffffff}
  end -- if
  -- save so we know current room later on  
  current_room = uid


--  ColourNote ("rosybrown", "", roomdesc)
--  ColourNote ("olive", "", uid)
    
local room = rooms [current_room]
  
  -- not cached - see if in database
  if not room then
    -- print ("Loading room", current_room, "from database")
    room = load_room_from_database (current_room)
  end -- not in cache
   
    
  
  if not room then
    -- print ("Added room", uid)  -- debugging
    -- print ("Name", name)
    -- ColourNote ("rosybrown", "", roomdesc)
     
    db:exec ("BEGIN TRANSACTION;") 	

    save_room_to_database (current_room, name, roomdesc)
    save_exits_to_database (current_room, exits)
    
    db:exec ("COMMIT;") 

    -- get it back now
    room = load_room_from_database (current_room)

  end -- if room not there
  
  -- call mapper to draw this rom
  mapper.draw (uid)    -- redraw room with name

  -- try to work out where previous room's exit led  
  if expected_exit == "-666" and from_room then
    fix_up_exit ()
  end -- exit was wrong
  
end -- process_exits