I'm using spatial analyst Natural Neighbor in Arcview 10.0, and every time I get the error above. I use many different data sources, with at least 10 points, this always worked before.. any ideas?
Is your point data "stacked", i.e. you have lots of points that have the same XY coordinates? I think the tool ignores stacked points so may be this is reducing your dataset to less than 10?
Also (not sure about this) may be you have set the output cellsize tool large and eveything falls within one cell?
