[ncl-talk] Error: Input must have at least three input vertices

[Dave Allured - NOAA Affiliate]

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.

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.


On Thu, Jul 4, 2019 at 9:11 AM Barry Lynn via ncl-talk <ncl-talk at ucar.edu>
wrote:

> Guilo:
>
> 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.
>
> You could start by providing a PrintVarSummary of data in your file.
>
> Barry
>
> On Thu, Jul 4, 2019 at 5:04 PM G.Monte--- via ncl-talk <ncl-talk at ucar.edu>
> wrote:
>
>> Dears all,
>> I have an issue with the plots of some ascii data on a contouring map. I
>> often get the message:
>>
>> Error:  Input must have at least three input vertices.
>>
>> Generally, what does this error message mean?
>>
>> Thank you.
>> Giulio
>
>
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