problems with setting up ns

[Latha Ravishankar <latha@eden.rutgers.edu>]

hi,

i tried to setup the Network Simulator..i tried both the forms(from
pieces
and all in one)..,but have not been sucessful..when i tried the
./configure ,this was the error i got

"configure: error: otcl is required but could not be completely found."

could u tell me what i should do to rectify this error..

thanx.
latha