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CAD tip CAD tip # 9280:

Question CAD 
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Q - question

Import STEP - Failed to calculate silhouettes of a face.

A - answer After you import a 3D model from a STEP format file (*.ste, *.stp, *.step), AutoCAD Architecture (or any other AutoCAD-based product) may display an error:

Failed to calculate silhouettes of a face.  
Modeling Operation Error:  
Inconsistent containments on coincident face_face_ints.

This error may be also displayed after each completed orbit and so it can slow down processing of your 3D model (up to tens of seconds).

The solution is to set the system variable DISPSILH in your drawing to 0.

E.g. AutoCAD Architecture templates set the DISPSILH variable to 1. A plain AutoCAD, or AutoCAD launched from an AutoCAD Architecture installation, has the DISPSILH variable set to 0.

100% *  CAD 
7.6.2013    7225×  

See also:
Tip 5800:Model import error: Coincident face_face_ints with different body vertices
Tip 1528:How to shorten the file-open time in Mechanical Desktop?
Tip 790:How to suppress the tesselation mesh and print only a silhouette of 3D solids?

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