跪求：houdini17 安装RenderMan教程

import rfh.config # relies on PYTHONPATH having been set above
File "C:/Program Files/Pixar/RenderManForHoudini-22.6/17.5/python2.7libs\rfh\config.py", line 49, in <module>
from node_desc import NodeDesc
File "C:/Program Files/Pixar/RenderManForHoudini-22.6/17.5/python2.7libs\node_desc.py", line 55, in <module>
from txmanager.txparams import TXMAKE_PRESETS
ImportError: No module named txmanager.txparams
这是什么错误。

请问有装Houdini18 Renderman的教程吗？