DODO Corona App

Hi, I am Ranjan Sahu, i  developed  small app when run this app then following error come, so i could not fix my error, Please help me for fix error. 

16:56:27.510  ERROR: Runtime error

16:56:27.510  C:\Users\Mr_Aryan\Documents\Corona Projects\DODO\scene1.lua:30: bad argument #3 to ‘newRect’ (number expected, got nil)

16:56:27.510  stack traceback:

16:56:27.510   [C]: in function ‘newRect’

16:56:27.510   C:\Users\Mr_Aryan\Documents\Corona Projects\DODO\scene1.lua:30: in function <C:\Users\Mr_Aryan\Documents\Corona Projects\DODO\scene1.lua:25>

16:56:27.510   ?: in function ‘dispatchEvent’

16:56:27.510   ?: in function ‘gotoScene’

16:56:27.510   C:\Users\Mr_Aryan\Documents\Corona Projects\DODO\main.lua:57: in function ‘_onEvent’

16:56:27.510   ?: in function ‘?’

16:56:27.510   ?: in function <?:677>

16:56:27.510   ?: in function <?:205>

Can you post the code from scene1.lua around line 30

Does your new rect look like this:

local obj = display.newRect(0,0,50,50)

Can you post the code from scene1.lua around line 30

Does your new rect look like this:

local obj = display.newRect(0,0,50,50)