[Closed] float_script addNode/addObject not working

What’s wrong with this snippet?
I get an error when the expression is applied because the addNode doesn’t seem to have worked. I have other code that’s exactly the same (sometimes addNode, other times addObject) and it works fine. Under what circumstances do addNode & addObject not get applied. I’ve confirmed that the object assigned in addNode does exist. I’m just not sure why it’s not being inserted into the float_script.

 	if widgetType == "joystick" then		-- remember, from upper-left, clockwise: 1, 2, 3, 4
 	(
 		widgetNode = getNodeByName(widgetName)
 		print("widgetNode = " + widgetNode.name)
 		if (widgetNode != undefined) then
 		(
 			-- each morpher is limited to 100 morph targets, so we'll just zip through all to see
 			-- if there is any data in the morph.  If there is, then we'll check it's name against shapeName
 			for i=1 to 100 do
 			(	
 				morphMod = $neutral
 
 				targetName = WM3_MC_GetName morphMod.morpher i
 				
 				if targetName == shapeName then
 				(
 					expr = "widgetNode.position.controller.x_position.controller.value*100"
 					
 					fe = float_script()
 					fe.addNode "widget" widgetNode
 					fe.setExpression expr
 					
 					morphMod.morpher[i].controller = float_script()
 					
 					print("EXPRESSION: " + expr)
 				)
 			)
 		)
 	)