Lua / corona sdk physics.addBody() - lua

Question

When my ball hits but 30 targets 30 new returns except I have an error message lua:76: physics.addBody() cannot be called when the world is locked and in the middle of number crunching, such as during a collision event why ?
function CreeNiveau()
print("Crée le Niveau 1 ")
local lig,col ,x,y
local largeurColonne = (display.actualContentWidth/(5+1))
x = display.screenOriginX + largeurColonne
y = display.screenOriginY + 100
-- si une cible et toucher la Remove et donne des point
local function onToucheCible(self, event)
if event.phase == "began" then
audio.play(sonBump)
self:removeSelf()
AjouteScore(25)
nbCible = nbCible - 1
print("Nombre de cible restent", nbCible)
if nbCible == 0 then
Recible()
end
end
end
for lig = 1,6 do
for col = 1, 5 do
local cible = display.newCircle(x,y, 8)
-- couleur des cible
cible:setFillColor(1,math.random(),math.random())
physics.addBody( cible, "static", { density = 1, friction = 0.3, bounce = 0.6, radius = 8})
cible.collision = onToucheCible
cible:addEventListener("collision")
globaleview:insert(cible)
x = x + largeurColonne
end
y = y + 50
x = display.screenOriginX + largeurColonne
end

Answer 1

You probably use physics functions/APIs in collision listener. Use timer.performWithDelay to delay execution of Recible function:
local function onToucheCible( self, event )
if event.phase == "began" then
audio.play( sonBump )
self:removeSelf()
AjouteScore( 25 )
nbCible = nbCible - 1
print("Nombre de cible restent", nbCible)
if nbCible == 0 then
timer.performWithDelay( 50, Recible )
end
end
end
Read more:
physics.addBody() cannot be called
physics.addBody cannot be called when the world is locked and in the middle of number crunching such as during a collision event