3D Contact on Code_Aster

hello to all forum.
I need another help about contact definition on 3D model using tetra and hexa element.
I see that under command Affe_car_mecha there is the keyword contact.
All the exxample that use this command, used for contact definition, are reffered on coque 3d or plae element.
Is possible use the same keyword with thetra and hexa element?
If I have 3d mesh Need define surface on 3d mesh to definethe contact zone?Is there some one can send me an example to study?

Regards
Jacop

Hi Jacopo
here is an example of contact between 2 bodies, modeled with 3D-elements.

Good luck, Johannes

PS: For more details You can contact me on www.code-aster.de

Thks for your help, I try Import the file using your command.
Really I import the IDEAS file using unite 19 and rading direct the .unv file with out the conversion, if I have problem to import the file i contact you.
Yesterday I attched a file in forum (testerror.rar) have you try to see it and see why the solution stopped?

Regards
Jacopo