Hello all, I'm trying to use Maple 9.5 to interpolate the data from the points in the worksheet below. I would have attached the 3K file but the web page says the file size is too big. The spline function gives me what appears to be a valid (if big and complicated) piecewise function, but I get an error when I try to plot it. I'm a little confused since I followed the help file for the spline function closely. Any ideas on how to troubleshoot this error? I get "Warning, unable to evaluate the function to numeric values in the region; see the plotting command's help page to ensure the calling sequence is correct"