The latest AutoCAD-versions don't need an object enabler to read these "proxy-objects" from the specialised Desktop-versions (Land & Mechanical & Architectural).
Proxy objects are like snapshots of the geometry that is generated by specialised objects: it's like having the 3D-model of a parametric GDL-object stored as polygons & points, without the actual script that created it: you only retain the end result.
You should ask the person who prepared these drawings to use the AECExplode (or similar) tools in Land Development Desktop prior to exporting, so at least all the geometry comes through. There is no way ArchiCAD will read these objects in their native form and certainly not when they passed through an older DWG-file verision, like r13.
--- stefan boeykens --- bim-expert-architect-engineer-musician ---
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