I realise you’re not supposed to do this… 
physics.setGravity( 0, 0 )
physics.start() …crashes the simulator (as least in build #722).
Whereas this…
local mky1 = display.newImageRect("images/monkey\_1.png", 140, 160);
physics.addBody(mky1)
physics.start() …just writes a nice terminal message: ERROR: physics.start() has not been called.
That looks like a bug to me. Both should produce the nice message because basically you shouldn’t be doing *any* physics stuff until after you’ve started physics.
[import]uid: 39538 topic_id: 20159 reply_id: 320159[/import]