attempt to call nil setFacing program

I've read through this program several times and I can't seem to find the miss-spelled function.

setFacing:6: attempt to call nil

local tArgs = ...
rednet.open("right")
local x,y,z = gps.locate(5)
setFacing(tArgs)
function getFacing()
turtle.dig()
turtle.forward()
x2,y2,z2 = gps.locate(5)
if x2 > x then
  facing = 3
end
if x > x2 then
  facing = 1
end
turtle.back()
turtle.turnRight()
turtle.dig()
turtle.forward()
x2,y2,z2 = gps.locate(5)
if z2 > z then
  facing = 0
end
if z > z2 then
  facing = 2
end
turtle.back()
turtle.turnLeft()
end

function setFacing(face)
getFacing()
while not facing == face do
  turtle.turnRight()
  getFacing()
end
end

turtle.dig can't be found.
Does the turtle have a tool equipped that it can dig with? A sword won't work.

He has a pickaxe. I even removed all the dig functions but got the same error.

The error message is referring to line 6, which is where turtle.dig is, which is what made me think that.
However, you seem to be calling setFacing before it exists on line 4. Try moving that call to the end of the file.

That worked! Thank you.