<div dir="ltr"><div dir="ltr">Also please show the single line in your program that generates this error. I am looking for the name of the NCL function that produces the error. Also please show the full text of the error messages produced, if there is more than a single message.<div><br></div><div>I do not like to speculate without enough information. However in this case, my guess is that you are using one of the NCL polygon drawing functions, and passing fewer than three data points to that function. Or possibly it is one of the great circle (gc_) functions which needs enough points to compute valid spherical polygons.</div></div><div><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Jul 4, 2019 at 9:11 AM Barry Lynn via ncl-talk <<a href="mailto:ncl-talk@ucar.edu">ncl-talk@ucar.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Guilo:<div><br></div><div>The last message I found about this on the web was from 2012. So, this isn't a typical error, and I believe that you need to define your data better for those who can help.</div><div><br></div><div>You could start by providing a PrintVarSummary of data in your file.</div><div><br></div><div>Barry</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Jul 4, 2019 at 5:04 PM G.Monte--- via ncl-talk <<a href="mailto:ncl-talk@ucar.edu" target="_blank">ncl-talk@ucar.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Dears all,<br>
I have an issue with the plots of some ascii data on a contouring map. I<br>
often get the message:<br>
<br>
Error: Input must have at least three input vertices.<br>
<br>
Generally, what does this error message mean?<br>
<br>
Thank you.<br>
Giulio</blockquote></div></blockquote></div></div>