Storyboard runtime error

Solar2D Corona APIs
#1

In one of my storyboard scenes, I have a back button which allows you to go back to the previous scene. Here is the code I am using

local function onSceneTouch( self, event )  
 if event.phase == "began" then  
 local lastScene = storyboard.getPrevious()  
 print(lastScene)  
 storyboard.gotoScene( lastScene, "slideLeft", 1000 )  
 return true   
 end  
 end  
  
 local backBtn = display.newImage("back\_buttonGrey.png", 380, 10)  
 backBtn.touch = onSceneTouch  
 backBtn:addEventListener( "touch", backBtn)

When I try to press the back button I get this error:

Runtime error ?:0: attempt to index field 'contentBounds' (a nil value) stack traceback: [C]: ? ?: in function '?' ?: in function 'gotoScene' ...phil\documents\corona projects\stuck\_scenes\shop.lua:59: in function <...phil projects>

I can not understand why this is not working, I have used code like this piece elsewhere in my app to allow a user to go back to the previous scene and it works [import]uid: 208811 topic_id: 36195 reply_id: 336195[/import] </…phil>

#2

Just to point it out, this:

 ...phil\documents\corona projects\stuck\_scenes\shop.lua:59: in function

is referring to this line in the code:

storyboard.gotoScene( lastScene, "slideLeft", 1000 )

[import]uid: 208811 topic_id: 36195 reply_id: 143729[/import]

#3

I overlooked something, in my exitScene() function in the previous scene I was adding an Event Listener instead of removing it. Once I changed this it worked. [import]uid: 208811 topic_id: 36195 reply_id: 143730[/import]

#4

Just to point it out, this:

 ...phil\documents\corona projects\stuck\_scenes\shop.lua:59: in function

is referring to this line in the code:

storyboard.gotoScene( lastScene, "slideLeft", 1000 )

[import]uid: 208811 topic_id: 36195 reply_id: 143729[/import]

#5

I overlooked something, in my exitScene() function in the previous scene I was adding an Event Listener instead of removing it. Once I changed this it worked. [import]uid: 208811 topic_id: 36195 reply_id: 143730[/import]

#6

Just to point it out, this:

 ...phil\documents\corona projects\stuck\_scenes\shop.lua:59: in function

is referring to this line in the code:

storyboard.gotoScene( lastScene, "slideLeft", 1000 )

[import]uid: 208811 topic_id: 36195 reply_id: 143729[/import]

#7

I overlooked something, in my exitScene() function in the previous scene I was adding an Event Listener instead of removing it. Once I changed this it worked. [import]uid: 208811 topic_id: 36195 reply_id: 143730[/import]

#8

Just to point it out, this:

 ...phil\documents\corona projects\stuck\_scenes\shop.lua:59: in function

is referring to this line in the code:

storyboard.gotoScene( lastScene, "slideLeft", 1000 )

[import]uid: 208811 topic_id: 36195 reply_id: 143729[/import]

#9

I overlooked something, in my exitScene() function in the previous scene I was adding an Event Listener instead of removing it. Once I changed this it worked. [import]uid: 208811 topic_id: 36195 reply_id: 143730[/import]