[ns] module installation problem

hi all ns users I'm working on DTN networks. i have found a patch for ns2.27 that implement a party of this architecture but when i installed it i had the following error $ ns dtn-demo-large.tcl invalid command name Agent/DTNAgent while executing Agent/DTNAgent set custodian_ 1 can someone

[ns] simulation de liaison satellite

hi every body I'm trying to simulate a satellite connexion between two wireless networks via satellite. But when i introduce the herarchical routing an error occur Can some one help me? thanks a lot