why is this error coming out in Corona sdk? - lua

Question

12:39:31.002 ERROR: Runtime error
12:39:31.002 C:\Users\User\Documents\Corona Projects\MATH FOR CHILDREN\level1.lua:207: attempt to call method 'setFillColor' (a nil value)
12:39:31.002 stack traceback:
12:39:31.002 C:\Users\User\Documents\Corona Projects\MATH FOR CHILDREN\level1.lua:207: in function 'listener'
12:39:31.002 D:\a\corona\corona\subrepos\timer\timer.lua:331: in function 'method'
12:39:31.002 D:\a\corona\corona\platform\resources\init.lua:220: in function <D:\a\corona\corona\platform\resources\init.lua:189>
This is my code
local composer = require("composer");
local scene = composer.newScene();
local widget = require( "widget" )
local json = require("json")
display.setDefault("background", 55/255, 50/255, 47/255);
------------------------------------------------------------------------------------
local tapText
local casi = display.newText( "a", display.contentCenterX, 700, "Myfontilqar-Regular.ttf", 42 )
casi:setFillColor(0/255,196/255,253/255,1)
local yes = display.newText( "c", display.contentCenterX, 700, "Myfontilqar-Regular.ttf", 46 )
yes:setFillColor(6/255,204/255,36/255,1)
local no = display.newText( "b", display.contentCenterX, 700, "Myfontilqar-Regular.ttf", 44 )
no:setFillColor(219/255,26/255,15/255,1)
local bal
local balpl
local vrem
local scetcikBal = 0
local scetcikBalpl = 0
local scetcikLevel = 0
local settings = {
yesJ = 0, noJ = 0, procent = 0, procent2 = 0
}
local function saveSettings()
local path = system.pathForFile( "itoq.json", system.DocumentsDirectory )
local file = io.open( path, "w" )
if (file) then
local contents = json.encode(settings)
file:write( contents )
io.close( file )
return true
end
end
local secondL = 20
local function obnovVr( event )
secondL = secondL - 1
vrem.text = secondL
if secondL == 0 then
settings.yesJ = scetcikBal
settings.noJ = scetcikBalpl
settings.procent = (scetcikBal * 10)
saveSettings()
composer.gotoScene( "Level1Score")
end
end
local kor = {
{display.contentCenterX - 66, display.contentCenterY + 120},
{display.contentCenterX + 70, display.contentCenterY + 120},
{display.contentCenterX - 66, display.contentCenterY + 200},
{display.contentCenterX + 70, display.contentCenterY + 200}
}
local tb = {
{"1 + 2 = ?",{"3","2","4","1"},"1 + 2 = 3"},
{"2 + 3 = ?",{"5","4","6","3"},"2 + 3 = 5"},
{"3 + 1 = ?",{"4","3","5","1"},"3 + 1 = 4"},
{"2 + 2 = ?",{"4","2","3","1"},"2 + 2 = 4"},
{"3 + 2 = ?",{"5","3","4","1"},"3 + 2 = 5"},
{"1 + 1 = ?",{"2","5","4","1"},"1 + 1 = 2"},
{"1 + 3 = ?",{"4","1","5","2"},"1 + 3 = 4"},
{"2 + 1 = ?",{"3","2","1","4"},"2 + 1 = 3"},
{"4 + 1 = ?",{"5","3","4","1"},"4 + 1 = 5"},
{"1 + 4 = ?",{"5","4","2","3"},"1 + 4 = 5"}
}
local j
for i = #tb, 2, -1 do
j = math.random( i )
tb[i], tb[j] = tb[j], tb[i]
end
local j1
for i = #kor, 2, -1 do
j1 = math.random( i )
kor[i], kor[j1] = kor[j1], kor[i]
end
local button1
local button2
local button3
local button4
nVoprosa = 1
local t = 2
local function stop1()
button1:setEnabled( false )
button2:setEnabled( false )
button3:setEnabled( false )
button4:setEnabled( false )
tapText.text = tb[nVoprosa][3]
tapText:setFillColor(6/255, 204/255, 36/255, 1)
end
local function stop2()
button1:setEnabled( false )
button2:setEnabled( false )
button3:setEnabled( false )
button4:setEnabled( false )
tapText.text = tb[nVoprosa][3]
tapText:setFillColor(219/255, 26/255, 15/255, 1)
tapText.size = 50
end
local function vb()
t = t - 1
if t == 0 then
scetcikBal = scetcikBal + 1
bal.text = scetcikBal
scetcikLevel = scetcikLevel + 1
if ( scetcikLevel == 10) then
settings.yesJ = scetcikBal
settings.noJ = scetcikBalpl
settings.procent = (scetcikBal * 10)
saveSettings()
composer.gotoScene( "Level1Score")
else
button1:setEnabled( true )
button2:setEnabled( true )
button3:setEnabled( true )
button4:setEnabled( true )
tapText:setFillColor(255/255, 255/255, 255/255, 1 )
nVoprosa = nVoprosa + 1
tapText.text = tb[nVoprosa][1]
button1:setLabel( tb[nVoprosa][2][1] )
button2:setLabel( tb[nVoprosa][2][2] )
button3:setLabel( tb[nVoprosa][2][3] )
button4:setLabel( tb[nVoprosa][2][4] )
local j1
for i = #kor, 2, -1 do
j1 = math.random( i )
kor[i], kor[j1] = kor[j1], kor[i]
end
button1.x = kor[1][1]
button1.y = kor[1][2]
button2.x = kor[2][1]
button2.y = kor[2][2]
button3.x = kor[3][1]
button3.y = kor[3][2]
button4.x = kor[4][1]
button4.y = kor[4][2]
end
t = 2
end
end
local function vbn()
t = t - 1
if t == 0 then
scetcikBalpl = scetcikBalpl + 1
balpl.text = scetcikBalpl
scetcikLevel = scetcikLevel + 1
if ( scetcikLevel == 10) then
settings.yesJ = scetcikBal
settings.noJ = scetcikBalpl
settings.procent = (scetcikBal * 10)
saveSettings()
composer.gotoScene( "Level1Score")
else
button1:setEnabled( true )
button2:setEnabled( true )
button3:setEnabled( true )
button4:setEnabled( true )
tapText:setFillColor(255/255, 255/255, 255/255, 1)
tapText.size = 40
nVoprosa = nVoprosa + 1
tapText.text = tb[nVoprosa][1]
button1:setLabel( tb[nVoprosa][2][1] )
button2:setLabel( tb[nVoprosa][2][2] )
button3:setLabel( tb[nVoprosa][2][3] )
button4:setLabel( tb[nVoprosa][2][4] )
local j1
for i = #kor, 2, -1 do
j1 = math.random( i )
kor[i], kor[j1] = kor[j1], kor[i]
end
button1.x = kor[1][1]
button1.y = kor[1][2]
button2.x = kor[2][1]
button2.y = kor[2][2]
button3.x = kor[3][1]
button3.y = kor[3][2]
button4.x = kor[4][1]
button4.y = kor[4][2]
end
t = 2
end
end
local function handleButtonEvent( event )
if ( "ended" == event.phase ) then
stop1()
timer.performWithDelay( 300, vb, t )
--vb()
end
end
local function handleButtonEventN( event )
if ( "ended" == event.phase ) then
stop2()
timer.performWithDelay( 300, vbn, t )
--vbn()
end
end
---------------------------------------------------------------------------------------
function scene:create( event )
local sceneGroup = self.view
timer.performWithDelay( 1000, obnovVr, secondL )
tapText = display.newText("", display.contentCenterX, display.contentCenterY - 80, "Lato-Regular.ttf", 40 )
tapText.text = tb[1][1]
button1 = widget.newButton(
{
id = "button1",
label = tb[nVoprosa][2][1],
onEvent = handleButtonEvent,
labelColor = { default={ 1, 1, 1 }, over={ 0, 0, 0, 0.5 } },
fontSize = 36,
font = "Lato-Regular.ttf",
emboss = false,
shape = "roundedRect",
width = 120,
height = 60,
cornerRadius = 0,
fillColor = { default={55/255,50/255,47/255,1}, over={31/255,76/255,115/255,1} },
strokeColor = { default={0/255,196/255,253/255,1}, over={0.8,0.8,1,1} },
strokeWidth = 3
}
)
button2 = widget.newButton(
{
id = "button2",
label = tb[nVoprosa][2][2],
onEvent = handleButtonEventN,
labelColor = { default={ 1, 1, 1 }, over={ 0, 0, 0, 0.5 } },
fontSize = 36,
font = "Lato-Regular.ttf",
emboss = false,
shape = "roundedRect",
width = 120,
height = 60,
cornerRadius = 0,
fillColor = { default={55/255,50/255,47/255,1}, over={31/255,76/255,115/255,1} },
strokeColor = { default={0/255,196/255,253/255,1}, over={0.8,0.8,1,1} },
strokeWidth = 3
}
)
button3 = widget.newButton(
{
id = "button3",
label = tb[nVoprosa][2][3],
onEvent = handleButtonEventN,
labelColor = { default={ 1, 1, 1 }, over={ 0, 0, 0, 0.5 } },
fontSize = 36,
font = "Lato-Regular.ttf",
emboss = false,
shape = "roundedRect",
width = 120,
height = 60,
cornerRadius = 0,
fillColor = { default={55/255,50/255,47/255,1}, over={31/255,76/255,115/255,1} },
strokeColor = { default={0/255,196/255,253/255,1}, over={0.8,0.8,1,1} },
strokeWidth = 3
}
)
button4 = widget.newButton(
{
id = "button4",
label = tb[nVoprosa][2][4],
onEvent = handleButtonEventN,
labelColor = { default={ 1, 1, 1 }, over={ 0, 0, 0, 0.5 } },
fontSize = 36,
font = "Lato-Regular.ttf",
emboss = false,
shape = "roundedRect",
width = 120,
height = 60,
cornerRadius = 0,
fillColor = { default={55/255,50/255,47/255,1}, over={31/255,76/255,115/255,1} },
strokeColor = { default={0/255,196/255,253/255,1}, over={0.8,0.8,1,1} },
strokeWidth = 3
}
)
--
button1.x = kor[1][1]
button1.y = kor[1][2]
button2.x = kor[2][1]
button2.y = kor[2][2]
button3.x = kor[3][1]
button3.y = kor[3][2]
button4.x = kor[4][1]
button4.y = kor[4][2]
casi.x = 240
casi.y = 2
yes.x = 40
yes.y = 2
no.x = 140
no.y = 2
bal = display.newText(scetcikBal, 80, 3, "Lato-Regular.ttf", 30 )
balpl = display.newText(scetcikBalpl, 180, 3, "Lato-Regular.ttf", 30 )
vrem = display.newText("20", 290, 3, "Lato-Regular.ttf", 30 )
sceneGroup:insert(bal)
sceneGroup:insert(balpl)
sceneGroup:insert(yes)
sceneGroup:insert(no)
sceneGroup:insert(vrem)
sceneGroup:insert(casi)
sceneGroup:insert(tapText)
sceneGroup:insert(button1)
sceneGroup:insert(button2)
sceneGroup:insert(button3)
sceneGroup:insert(button4)
end
function scene:show( event )
local sceneGroup = self.view
local phase = event.phase
if (phase == "will") then
elseif (phase == "did") then
end
end
function scene:hide( event )
local sceneGroup = self.view
local phase = event.phase
if (phase == "will") then
elseif (phase == "did") then
composer.removeScene( "level1" )
end
end
function scene:destroy( event )
local sceneGroup = self.view
end
-- -----------------------------------------------------------------------------------
-- Scene event function listeners
-- -----------------------------------------------------------------------------------
scene:addEventListener( "create", scene )
scene:addEventListener( "show", scene )
scene:addEventListener( "hide", scene )
scene:addEventListener( "destroy", scene )
-- -----------------------------------------------------------------------------------
return sceneenter code here

Answer 1

C:\Users\User\Documents\Corona Projects\MATH FOR CHILDREN\level1.lua:207: attempt to call method 'setFillColor' (a nil value)
In line 207 of level1.lua you do this setFillColor() which is not allowed as setFillColor is not a function value but a nil value.
setFillColor is a method of the ShapeObject class. Make sure you're doing using it like this: myShapeObject:setFillColor(myColor)