[GRASS-user] grass

[ec.jkd at tpcsed.com]

hi,
  while doing shortest path in grass i get the below error:
echo "1 1 2" | v.net.path mydgn_net afcol=forward abcol=backward out=myp
Building graph:
Registering arcs ...  100%
Flattening the graph ... done.
Graph was built.
WARNING: 8032 points without category (nfield: 2).
WARNING: No point with category 1
WARNING: No point with category 2
Attributes:
  cat  - path unique category assigned by module
  id   - path id (read from input)
  fcat - from point category
  tcat - to point category
  sp - result status:
       0 - OK, path found
       1 - node is not reachable
       2 - point of given category does not exist
  cost - travelling costs (on the network, not to/from network)
  fdist - the distance from first point to the network
  tdist - the distance from the network to second point
WARNING: 2 points of given category missing
Building topology ...
0 primitives registered
0 areas built
0 isles built
Attaching islands:
Attaching centroids: Topology was built.
Number of nodes     :   0
Number of primitives:   0
Number of points    :   0
Number of lines     :   0
Number of boundaries:   0
Number of centroids :   0
Number of areas     :   0
Number of isles     :   0

Kindly, assisty me with this