<div dir="ltr"><div><div><div>Hi Georgie, <br><br></div>here is a minimum example: if you run the script.sh you would get the error,<br><br></div>thanks a lot!<br><br></div><div>Julien<br></div><div><div><br></div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, May 6, 2015 at 2:19 AM, Geordie McBain <span dir="ltr"><<a href="mailto:gdmcbain@freeshell.org" target="_blank">gdmcbain@freeshell.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">2015-05-06 2:20 GMT+10:00 Julien Derr <<a href="mailto:julien.derr@gmail.com">julien.derr@gmail.com</a>>:<br>
> Hi again, I am back again with the same error message!<br>
><br>
> but this time I checked that I didn't have twice the same points. He re is<br>
> the problem:<br>
><br>
> What happen is that I have 3 points perfectly aligned, and it seems gmsh is<br>
> making a flat triangle with them.<br>
<br>
</span>Hello. I wouldn't have thought that collinearity would present a<br>
problem, necessarily, depending on how the points are used to define<br>
surfaces. I wasn't sure that I'd come across this before so created a<br>
simple degenerate quadrilateral, as attached; Gmsh & FreeFem++ seemed<br>
happy enough.<br>
Or do you mean that the three points are coincident rather than<br>
merely collinear?<br>
Do you have an exemplary .geo file that you could share?<br>
<br>
I agree that having to reduce the characteristic length to avoid the<br>
problem would be inconvenient and undesirable, but I'm hopeful that<br>
there's another way.<br>
</blockquote></div><br></div>