importing DLG elevation files

Hi

I've got some problem while importing DLG elevation file.

DLG Hypsography file has 4 attributes for each line so I've needed to
create multiple attribute file as an option of v.import with base for
multiple attributes=1. This file was created but is additional to the
regular dig_att files and is not linked to the imported vector file.
As a result each line has the internal ID number as an attribute
instead of needed elevation value. Besides when I tried to run
v.reclass to change these attributes I've got the response that there
is no category support for my vector file - nothing is residing in a
dig_cats folder.
It would be great if somebody can answer these questions: How to
assign the right attributes to the lines and How to create the
category support in this case?

Thanks a lot
--
  Helena Voinov
  Univ.of Maryland Inst.for Ecological Economics
  Center for Environmental and Estuarine Studies
  P.O. Box 38, Solomons, MD 20688
  TEL: (410) 326 7248
  FAX: (410) 326 7354