curve network giving error

Hi gh gurus,

I am in the first weeks of using the program. I am familiar with Rhino. 

I created a curve network like I would in Rhino with three curves. In this case 2 curves in U direction, one in V. However, Gh gives an error that you have to have two curves in each direction. So I included two points to the V group. The surface was created but the results give an error saying 'Data conversion failed from point to curve'. Any ideas?

Jill