[ns] regarding wireless scenario file

[gmail fan]

Hi,
    I am working with AODV and I am using wireless scenario files
generated using "setdest" program in "ns-2.26/indep-utils" directory.
When I generated scenario for 1500mx1500m grid and 80 nodes, the file
has
" Destination Unreachables: 322". I tried to see setdest.cc but it was
not clear to me how the destinations unreachables is calculated. This
is effecting my PDR (Packet Delivery Ratio).
 PLEASE HELP ME IN THIS CONTEXT
Addada.