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Been trying to rig in Houdini, went through the rigging series which was decent but the script for Matching FKIK comes up with an error when I execute it. If you didn't see the video series. This is on the last video. Inside the HDA there is a parameter button created with the callback script hou.pwd().hdaModule().matchIK(kwargs,"arm") This is the code def matchIK(kwargs,type): if kwargs["script_parm"][0] == "L": side = "L" else: side = "R" prefix = side + "_" + type asset = kwargs["node"] bone1 = hou.node(asset.path() + "/" + prefix + "bone_1") bone2 = hou.node(asset.path() + "/" + prefix + "bone_2") fkcontrol1 = hou.node(asset.path() + "/" + prefix + "_bone_1_ctrl") fkcontrol2 = hou.node(asset.path() + "/" + prefix + "_bone_2_ctrl") fkcontrols = [fkcontrol1, fkcontrol2] bones = [bone1, bone2] if type == "leg" prefix = side + "_" + "foot" bone3 = hou.node(asset.path() + "/" + prefix + "_bone_1") bone4 = hou.node(asset.path() + "/" + prefix + "_bone_2") fkcontrol3 = hou.node(asset.path() + "/" + prefix + "_bone_1_ctrl") fkcontrol4 = hou.node(asset.path() + "/" + prefix + "_bone_2_ctrl") bones.append(bone3) bones.append(bone4) fkcontrols.append(fkcontrol3) fkcontrols.append(fkcontrol4) for i, fkcontrol in enumerate(fkcontrols): curbone = bones bonepath = "/".join(curbone.path().split('/')[2:]) iksolver = curbone.node(curbone.parm("solver").eval()) chopstring = 'chop("' + iksolver.path() + '/' + bonepath chans = ["rx", "ry", "rz"] for chan in chans: if abs(hou.hscriptExpression(chopstring + ':' + chan + '")')) < 0.0001: rot = 0.0 else: rot = hou.hscriptExpression(chopstring + ':' + chan + '")') if not fkcontrol.parm(chan).islocked(): fkcontrol.parm(chan).setPending(rot) Error says line 16, in matchIK AttributeError: 'NoneType' object has no attribute 'path' Im fairly clueless when it comes to scripting just wanted to be able to match IK Fk. Help would be appreciated as would any advice on places to start with python scripting. Many thanks, Duncan