I have successfully inserted a curve defined by XYZ points into solidworks. Now I would like to convert it into a sketch by using "Convert Entities" so that I can then revolve it around an axis by using "Revolved Boss/Base".

However, when I try to use "Convert Entities" I get a message: "Sketch cannot be inserted using the currently selected edge." and U dont know why that is. 

The curve which I inserted