I am trying to use an node which is created by my team met, I could not find this node in my system can some pls help me sort this issue.
What type of element are you rotating? My guess is this was built to work with FamilyInstances, not any generic element as most elements (think pipes, walls, floors, etc.) don’t have a ‘rotation’ that you’d want to set this way. If that is the case, FamilyInstance.SetRotation likely will work.