I would recommend you look at the .SDL format file which is the ASCII
equivelent of a .SDF. You may be able to manipulate (manually or
programatically) your text file to get the information into the required
format. You can then use SDFLoader to convert the .SDL to .SDF. There is a
switch with SDFLoader to append to the file rather than overwrite it.
--
Andy Morsell, P.E.
Spatial Integrators, Inc.
http://www.SpatialGIS.com
"Giovanni" wrote in message
news:4873961@discussion.autodesk.com...
hi
i need to append new object to a sdf file
from a txt file where i have a polyline and coordinate of every point
there is someone function for this question
thanks Giovanni