Importing IGES NURBS Patch (entity 128)

Can anyone shed some light on the fact that the simple IGES file below does not
import? It has only one surface entity, a #128 NURBS Patch.

Relevant part of import report:

=================================================================
Precision analysis of IGES file:
=================================================================
Most prevalent number of significant digits: 2
Highest number of significant digits: 7
Average number of significant digits: 1.66154
Maximum distance to origin: 18484.9
Minimum distance to origin: 0
Effective number of significant digits: 7


=================================================================
Entity Summary
=================================================================
-----------------------------------------------------------------
Type Name Count Converted
---- ---- ----- ---------
128 Rational B-spline surface 1 0
314 Color definition 1 1
406 Property 3 3
_________________________________________________________________



The IGES file: (cut below line)
_________________________________________________________________
S 1
1H,,1H;,, G 1
61HC:\Documents and Settings\System Admin\Skrivbord\Untitled.igs, G 2
26HRhinoceros ( Jun 6 2005 ),31HTrout Lake IGES 012 Jun 6 2005, G 3
32,38,6,308,15, G 4
, G 5
1.0D0,2,2HMM,1,0.254D0,13H060418.115057, G 6
0.01D0, G 7
18000D0, G 8
, G 9
, G 10
10,0,13H060418.115057; G 11
314 1 0 0 0 0 0 000000200D 1
314 0 1 1 0 0 0 COLOR 0D 2
406 2 0 0 1 0 0 000000300D 3
406 0 -1 1 3 0 0LEVELDEF 0D 4
406 3 0 0 7 0 0 000000300D 5
406 0 -1 1 3 0 0LEVELDEF 0D 6
406 4 0 0 0 0 0 000010300D 7
406 0 0 1 15 0 0 NAMETXT 0D 8
128 5 0 0 7 0 0 000000000D 9
128 0 -1 11 0 0 0 Ns_0 0D 10
314,0.0,0.0,0.0,20HRGB( 0, 0, 0 ); 0000001P 1
406,2,1,7HDefault; 0000003P 2
406,2,7,12HIGES level 0; 0000005P 3
406,1,4HNs_0; 0000007P 4
128,3,3,3,3,0,0,1,0,0,0.0D0,0.0D0,0.0D0,0.0D0,1.0D0,1.0D0,1.0D0, 0000009P 5
1.0D0,0.0D0,0.0D0,0.0D0,0.0D0,1.0D0,1.0D0,1.0D0,1.0D0,1.0D0, 0000009P 6
1.0D0,1.0D0,1.0D0,1.0D0,1.0D0,1.0D0,1.0D0,1.0D0,1.0D0,1.0D0, 0000009P 7
1.0D0,1.0D0,1.0D0,1.0D0,1.0D0,18000.0D0,0.0D0,0.0D0,12000.0D0, 0000009P 8
0.0D0,-600.0D0,6000.0D0,0.0D0,-600.0D0,0.0D0,0.0D0,0.0D0, 0000009P 9
18000.0D0,1900.0D0,0.0D0,12000.0D0,2800.0D0,-600.0D0,6000.0D0, 0000009P 10
1300.0D0,-600.0D0,0.0D0,0.0D0,0.0D0,18000.0D0,2100.0D0, 0000009P 11
1333.333D0,12000.0D0,3700.0D0,1333.333D0,6000.0D0,1600.0D0, 0000009P 12
1333.333D0,0.0D0,0.0D0,1333.333D0,18000.0D0,2200.0D0,2000.0D0, 0000009P 13
12000.0D0,3700.0D0,2000.0D0,6000.0D0,1700.0D0,2000.0D0,0.0D0, 0000009P 14
0.0D0,2000.0D0,0.0D0,1.0D0,0.0D0,1.0D0,0,1,7; 0000009P 15
S0000001G0000011D0000010P0000015 T 1

 

Thanks for your efforts!
I have also discovered that placing two control points on top of each other (which
is OK in many other apps) is apparently not OK in the SWX IGES importer.

/C

Paul Salvador skrev:

 

Just for laughs, I saved the file as an IGES, and then opened it in
SW...no more errors....