This message means that the original drawing has an arc, circle, or ellipse that we could not convert. If there are many of these we will work them out further. Since DBDOC is intended to show an approximation of the AuotCAD or MicroStation sheet, being unable to process some things may not be too much of a problem.
--Scanning AutoCAD file D80024B.DWG Conversion Error: Failed to convert arc, circle or ellipse... entity ignored
This error can be built directly into Hyperview. For more information, see the article Building error reports into the M14.