could not find logical rectangle from curve loop

Coreform Cubit Meshing
#1

I am getting the following error trying to create a net surface from a facet surface:

import facets “Top_6A_se_2_200m.facet” merge stitch feature_angle 10
surface 1 size auto factor 6
mesh surface 1
create surface net from mapped surface 1 heal

ERROR:
could not find logical rectangle from curve loop on surface(s)Problem is in area of vertice(s): 1

Here is the facet surface.
https://www.dropbox.com/s/yc007kce04n1nhl/Top_4A_points_surf.facet?dl=0

What do you suggest?

#2

The DropBox link is to a different file than the one in your journal file. Do you have Top_6A_se_2_200m.facet in DropBox?

#3

Here is the link

dropbox.com/s/lg0vgfxwj4iwm … facet?dl=0

#4

Converting mesh-based geometry to real geometry is challenging. When I ran your script, I didn’t get the same error you did. The error that I get when running this script is

ERROR: Surface 1 must have scheme map or submap mesh for net surface approximation

You might try a little trick to get a surface that will work with the “create acis surf 1” command to make ACIS geometry. Try this

reset
import facets “Top_6A_se_2_200m.facet” feature_angle 135.00 merge make_elements stitch
#you get tets importing this way, so you could import without “make_elements”
del mesh
composite create surf all #creates one surface
mesh surf 3
export stl “vol1.stl” surf 3 mesh overwrite #this exports the mesh only
reset
import stl “vol1.stl” #import the mesh to create a single surface
mesh surf 1
create acis surf 1
del vol 1

#5

But there is a problem with creating acis surf using “mesh surf 1” and “create acis surf 1.” The mesh lines become part of the acis surface. I don’t want that because when I use this surface to do boolean operations inside a volume, these mesh lines will be imprinted on the volume. I don’t want to use these mesh lines in the final tetmesh that will be created inside this volume.

Any suggestion?

#6

I figured out a way from what I learnt from you so far.