The challenge with using these tools lies in the CAD file format.

These checkers can be built into specific CAD packages or work on a number of CAD file formats.

As most CAD file formats are not open, this option is limited to either systems owned by the same company or via hacking of competitor's file format.

The CAD file format used by Creo Elements / Direct Modeling Express uses a .

CAD data exchange involves a number of software technologies and methods to translate data from one Computer-aided design system to another CAD file format.

The Bentley's PseudoStation experience convinced them that there was a ready market for a stand-alone personal computer-based CAD system compatible with the Intergraph CAD file format.

Exported CAD file formats are recognized by many software such as CAD, FEA, Fluid Dynamics and Mold Flow software.

DGN (design) is the name used for CAD file formats supported by Bentley Systems' MicroStation and Intergraph's Interactive Graphics Design System (IGDS) CAD programs.

When opening CAD file formats not in Rhino native file format, the program will always create a new drawing called "Untitled" and convert the file, meaning that for the file to remain in its old file format it must be re-converted to its original format.