PDMS Draft seems to have trouble exporting AutoCAD. Using the configurable DWF/DWG method, PDMS exports drawings as Polylines, which are not consistent. For example, PDMS cannot export arcs as polylines. In this regard, I have been trying to disable Polylines, when exporting from PDMS Draft to AutoCAD. I have tweaked the option switch PrimitiveThickness 'OFF but it does not make any difference, as the polylines still come through.
block all hvac, include name block all rest, include name block all pipe, include name block all equi, include name block all stru, include name LAYER all PIPE, 'PipeLayer'