OK, I see the problem. Its the data structure you had chosen. You have just a single matrix consisting of the coordinates of 80 points. All you can do with that is plotting a 3D polygon, connecting the points in the order they are in your vector. As you don't have a surface but just a 3D curve, Prime does not offer surface fill.
As you want a surface to be plotted you would have provide the data in a different way. Either provide analytical functions or a datastructure consisting of 3 n x m matrices nested in a vector. Each of these matrices would correspond to x-, y- and z-coordinates respectively and that way each point would not just have two neighbours is can be connected with as in you structure, but would have ave four neighbours - thus creating a surface mesh which then could be filled. This kind of structure can be created by hand or, if you provide analytical functions is automatically created using Createmesh() which you can lookup in the help.
It doesnt seem practicable to derive the necessary structure from the vector you provide. How was the data you provided derived?
