Segmentation faults with 3d surface plots

Hi,

I have a data file of points that I am trying to plot with a 3d surface.  I 
have installed scigraphica on my linux Red Hat 7.2 system and it seems to be 
working. However, when I try to make a surface plot with the data, as soons as 
I hit the button "apply" in the layer window, I get a segmentation fault.  I 
have attached the data set that I am trying to use (it is a plain text file).  
Can you tell me what the problem might be?

Thanks,
  Sarah Cousienau