If a data file moves
from its original location, you may get an error when you open the
map that references that data. For example, someone else might create
a map using an SDF file. That person then sends the map and SDF
file to you. If you store the SDF file with a different path name
than the one used by the original map creator, AutoCAD Map 3D displays
To resolve this problem,
you must reconnect the data using the correct path. By doing so,
you maintain styling information.
avoid this problem, use eTransmit to package and transfer files
for a map. Although this method does not work for database data
(such as Oracle or SQL Server data stores), it preserves the connections
of all file-based data, such as SDF and SHP.