CAD (Geometry) Formats for Import

View the supported CAD (geometry) formats that can be imported into CADFEKO and the supported versions.

CADFEKO is based on the Parasolid solid modelling kernel that allows models to be imported and exported from and to the native Parasolid format without any translation.

Since all imported CAD models are converted to a Parasolid format during the import process, importing from other CAD formats may cause unexpected results. Differences in the internal representation used by various CAD formats may cause adjoining surfaces not to line up correctly. This discrepancy is due to tolerance differences. Models that use a numerical representation can cause faults during scaling.

The following CAD (geometry) formats are supported for import:
Formats File Format Supported Versions
3Di .3di -
ACIS .sat R1 – 2021 1.0
AutoCAD .dxf 2.5 – 2021
CATIA V4 .model, .session, .exp 4.1.9 to 4.2.4
CATIA V5 .CATPart, .CATProduct, .CATShape V5 R8 to V5–6 R2021
Gerber Any (standard format .gbr) Extended Gerber / RS-274X
IGES .iges, .igs Up to 5.3
ODB++ .tgz, .tar.gz -
Parasolid .x_t, .x_b 9.0.x - 33.0.x
Pro / Engineer .prt, .asm 16 to Creo 7.0
STEP .step, .stp AP203, AP214, AP242
Unigraphics and NX .prt 11 - NX 1926 Series


Supported entities are:
  • 3D face
  • Arc
  • Circle
  • Ellipse
  • Line
  • Polyline
  • Polyface mesh (3D)
Unsupported entities are:
  • Point
  • Spline
  • 3D Solid
  • Trace
  • Dimensional annotations


Isolated vertices (acorns) are not imported.1 The coordinates are written to the message window and can be created manually should they be required.

1 These are not the same as named points.