Here's my code: local button = winMgr:createWindow("TaharezLook/Button", btName) button:setText(item[1]) button:setSize( CEGUI.Size:new_local(0.5,0.1) ) button:setPosition(CEGUI.Point:new_local(0.1, 0.2)) MainBar:addChildWindow(button) when it runs, an exception dialog pops up. After I tra...