Converts legacy polylines and hatches for use with later product releases.
Hatches created in earlier product releases are not updated automatically when a drawing
opened in AutoCAD Release 14 or AutoCAD LT 97 or later. Information about the rotation
of a hatch pattern may not be updated properly if you have changed the UCS since creating
the hatch. When updating hatches with CONVERT, it is recommended that you use the
Select option so that you can check your results.
In most cases, you do not need to update polylines with CONVERT. By default, the PLINETYPE
system variable specifies that polylines are updated automatically when you open an
older drawing. Polylines may be created in the old format by third-party applications,
and they may be contained in an older drawing that was inserted as a block and then