Hi all I need help with Arnold for Houdini installation I have this problem , Please find it in the attached file <<< Traceback (most recent call last): File "arnold_light", line 6, in <module> File "C:/PROGRA~1/SIDEEF~1/HOUDIN~1.557/houdini/python2.7libs\objecttoolutils.py", line 482, in genericCameraLightTool camlight = genericTool(scriptargs, nodetypename, nodename, clicktoplace) File "C:/PROGRA~1/SIDEEF~1/HOUDIN~1.557/houdini/python2.7libs\toolutils.py", line 1251, in new_func return function(*args, **kwargs) File "C:/PROGRA~1/SIDEEF~1/HOUDIN~1.557/houdini/python2.7libs\objecttoolutils.py", line 441, in genericTool exact_node_type = exact_node_type) File "C:/PROGRA~1/SIDEEF~1/HOUDIN~1.557/houdini/python2.7libs\objecttoolutils.py", line 379, in genericObjNodeGeneratorTool exact_node_type ) File "C:/PROGRA~1/SIDEEF~1/HOUDIN~1.557/houdini/python2.7libs\objecttoolutils.py", line 320, in createObjNode exact_type_name = exact_node_type) File "C:/PROGRA~1/SIDEEF~1/HOUDIN~1.557/houdini/python2.7libs\houpythonportion.py", line 1287, in decorator return func(*args, **kwargs) File "C:/PROGRA~1/SIDEEF~1/HOUDIN~1.557/houdini/python2.7libs\hou.py", line 6585, in createNode return _hou.Node_createNode(*args, **kwargs) MatchDefinitionError: Failed to match node type definition. Error: Bad node type found: arnold_vopnet in /obj/arnold_light1/shopnet. Bad node type found: arnold_light in /obj/arnold_light1/shopnet/arnold_vopnet. Warning: Ignoring data for locked node: arnold_light1/shopnet/arnold_vopnet/OUT_light Ignoring data for locked node: arnold_light1/shopnet/arnold_vopnet/OUT_light Ignoring data for locked node: arnold_light1/shopnet/arnold_vopnet/OUT_light >>> Thanks Salah