For all issues regarding the Forums use, please, refer to the Forum Rules.

Our Solutions

Need professional assistance?
Consider our:

Support Offerings


Need to speed up your development?
Have a look at our:

Samples & Tools


Need some functionality extending standard OCCT capabilities?
Check out our:

Adv. Components

Related pages

IGES and solids

James D.'s picture

I have this solid here and get the message:

Report: 6 unknown entities.

And dont't understand why? I have a solid!

Forum supervisor's picture

Dear James,
You have compound of 6 faces.
You may check type of just read shape.
If you want to keep in iges file a shape of type Solid,
use the corresponding write mode(variable ' modecr') ==> BRep.
In last case you will be able to read back a solid.

James D.'s picture

"use the corresponding write mode(variable ' modecr') ==> BRep."
I use B-Rep

"You may check type of just read shape."
To check? I read this like in the example (doc) with ... or what do you mean?

Forum supervisor's picture

Dear James,
See chapter "5. 2. 1 Topological types" of the "Modeling Data User's Guide".

James D.'s picture

and how can I use that with IGESControl_Reader???

Hans's picture

Because of all your questions along this board it would be better if you first try to understand the included samples like "Import Export" for importing different file types. There you can see how to import an IGES file.
And "Viewer 3d" for visualization of your files.

Have a look at iges.pdf - Chapter 2 "Description of the process".

I developed my application after trying to understand the samples and this chapter and i'm able to import your attached *.igs file without any problems.


James D.'s picture

I don't know how to set the parameter ...

James D.'s picture

it does not work with IGES as B-Spline

IGESControl_Reader myIgesReader;
Standard_Integer nIgesFaces,nTransFaces;

IFSelect_ReturnStatus status = aIgesReader.ReadFile ("\\..\\");

Standard_Integer ic = Interface_Static::IVal("read.iges.bspline.continuity");
Interface_Static::SetIVal ("read.iges.bspline.continuity",2);

if (status == IFSelect_RetDone)

Contact us

Attention: DO NOT use this form for all kind of request for the removal of your personal data. Please follow this link for such cases.