I am a newbie. I try to make hair with bezier circle and path. After selecting path, go under geometry to pick object target, it doesn't recognize circle. Under object list, there is only one NurvsPath. If I pick circle first, it recognize path, so it make disk like shape. What can be a problem? Thanks in advance.
I see you have the bevel object of the bezier circle set to the nurbs path, but I believe this is backwards. I believe you should have set the bevel object of the nurbs path set to bezier circle, as you intially tried to do.
Make sure that when you have the path selected, it looks like this: https://i.stack.imgur.com/nvRK6.jpg . The nestedness of the collections doesn't have to match what I did, but focus on the way I selected the path.
See how the logo to the left of the object, "NurbsPath" and how it's highlighted? This indicates that the NurbsPath is the active object. Your active object is the Circle, so I would avoid doing any shift-selects if that's the cause.