Everything points to the fact that .dw2 and .dcx files come from DesignCAD software, so it is this software you have to most likely use for dw2 to dcx conversion. Said that, we have not found any particular mentions of such export and .dcx files might not even be CAD drawings. So if you have specific issues with this export, it would be perhaps best to reach out to DesignCAD support.
Updated: September 14, 2023