Access Denied

Hi there,

When I try to use the rename function in my file browser, I get access denied. I am not trying to rename the rom or any read-only folders.
The code is as follows:

--[[
COPYRIGHT (C) SAMGUNNER 2014.
FILE BROWSER 0.1 IS LICENSED UNDER CREATIVE COMMONS BYNCSA 4.0.
]]--
local args = {...}
local bground = paintutils.loadImage("os8/assets/filemanager/bground")
dir = args[1]
function main()
term.setTextColor(colors.gray)
term.clear()
function backDir()
  local path = shell.dir()
  local parPath = fs.getDir(path)
  if fs.exists(parPath) then
  shell.setDir(parPath)
  main()
  else
  main()
  end
end
function drawMenu(xPos, yPos, filess, foldss, foldNum)
  local var1 = (yPos-(foldNum+2))
  if filess[var1] ~= nil then
  paintutils.drawLine(xPos,yPos,xPos+10,yPos,colors.blue)
  paintutils.drawLine(xPos,yPos+1,xPos+10,yPos+1,colors.blue)
  paintutils.drawLine(xPos,yPos+2,xPos+10,yPos+2,colors.blue)
  paintutils.drawLine(xPos,yPos+3,xPos+10,yPos+3,colors.blue)
  term.setCursorPos(xPos,yPos)
  print("FILE MENU")
	term.setCursorPos(xPos,yPos+1)
  print("Edit")
  term.setCursorPos(xPos,yPos+2)
  print("Run")
  term.setCursorPos(xPos,yPos+3)
  print("Rename")
  while true do
  local event, button, x, y = os.pullEvent("mouse_click")
  if button == 1 and x>=xPos and x<=xPos+10 and y==yPos+1 then
	shell.run("edit "..filess[var1])
main()
  elseif button == 1 and x>=xPos and x<=xPos+10 and y==yPos+2 then
	shell.run(filess[var1])
main()
  elseif button == 1 and x>=xPos and x<=xPos+10 and y==yPos+3 then
	paintutils.drawLine(10,6,40,6,colors.gray)
paintutils.drawPixel(10,7,colors.gray)
paintutils.drawPixel(40,7,colors.gray)
paintutils.drawLine(11,7,39,7,colors.white)
paintutils.drawLine(10,8,40,8,colors.gray)
term.setCursorPos(11,6)
print("Rename")
term.setCursorPos(11,7)
term.setBackgroundColor(colors.white)
local renameName = read()
fs.move(filess[var1],renameName) --# The error occurs here whenever I try to rename the same file more than once in the same instance of computercraft.
main()
  else
	main()
  end
  end
else
  paintutils.drawLine(xPos,yPos,xPos+11,yPos,colors.blue)
  paintutils.drawLine(xPos,yPos+1,xPos+11,yPos+1,colors.blue)
  term.setCursorPos(xPos,yPos)
  print("Folder Menu")
  term.setCursorPos(xPos,yPos+1)
  print("Rename")
  while true do
  local event, button, x, y = os.pullEvent("mouse_click")
  if button == 1 and x>=xPos and x<=xPos+10 and y==yPos+1 then
	paintutils.drawLine(10,6,40,6,colors.gray)
paintutils.drawPixel(10,7,colors.gray)
paintutils.drawPixel(40,7,colors.gray)
paintutils.drawLine(11,7,39,7,colors.white)
paintutils.drawLine(10,8,40,8,colors.gray)
term.setCursorPos(11,6)
print("Rename")
term.setCursorPos(11,7)
term.setBackgroundColor(colors.white)
local renameName = read()
fs.move(foldss[xPos-2],renameName)
main()
  else
	main()
  end
  end
end
end
local dir = "/"..shell.dir()
paintutils.drawImage(bground,1,1)
term.setTextColor(colors.black)
term.setCursorPos(2,1)
print(dir)
term.setCursorPos(3,2)
print("..")
term.setCursorPos(51,1)
print("X")
local lib = fs.list(dir)
local folds = {}
local files = {}
for n, item in pairs(lib) do
if string.sub(item,1,1) ~= "." then
  local itemPath = fs.combine(dir,item)
  if fs.isDir(itemPath) then
	table.insert(folds, item)
  else
	table.insert(files, item)
  end

end
end
local foldNum = 0
table.sort(folds)
table.sort(files)
write("\n")
for n, foldPrint in pairs(folds) do
  term.setBackgroundColor(colors.lightGray)
  write("[]")
  term.setBackgroundColor(colors.white)
  foldNum = foldNum+1
  write(foldPrint.."\n")
end
for n, filePrint in pairs(files) do
  term.setBackgroundColor(colors.lightGray)
  write("()")
  term.setBackgroundColor(colors.white)
  write(filePrint.."\n")
end
while true do
local event, button, x, y = os.pullEvent("mouse_click")
if button == 2 then
if y>1 then
   drawMenu(x,y,files,folds,foldNum)
end
elseif button == 1 and x==51 and y==1 then
  exit()
elseif button == 1 and x>=1 and x<=51 and y==2 then
  backDir()
end
end
end
while true do
main()
end

What am I doing wrong?

Thanks,
- Sam

At a glance, I can't see anything that'd produce that error. Try sticking in some print statements before the offending line, to make it clear what it's attempting to rename to what.

There's no point in re-defining your backDir() / drawMenu() functions over and over again. Do it once, before calling main().

Recursively calling main() will cause other issues.