Answer:
RFEM can communicate with Autodesk Inventor in a limited way. Inventor reads and writes volumetric and geometric information similar to .IFC coordination view files. A .STEP file can be exported from this program. RFEM can then import such files in the BIM/CAD Model with the additional module RF-LINK.
RF-LINK Add-on Module for RFEM 5
Alternatively, any CAD program has the ability to export .DXF files which allow RFEM to read center line information. This is not a full solution and will require additional work for the user once in RFEM but does not require any addition add-on modules.
Lastly, a user can utilize RF-COM/RS-COM to develop a process to read any CAD software into RFEM/RSTAB through an open API interface.
Product Description of RS-COM
