SAVEROUNDTRIP
Controls action on unrecognizable entities when you save drawings in AutoCAD Release 14 file format. Some entities that may not be recognized are lineweights, layouts, long table names, and enhanced colors.
Type: Integer
Saved: In the registry
Range: 0 (Deletes unrecognizable entities), 1 (Saves unrecognizable entities as proxies)
Default: 1