Hi friends, i'm trying to simutate GPSR protocol.For the organization of the directories, i put these informations in the correspondant .sh file proto=GPSR simdir=gpsrsimulation statdir=stat scendir=$simdir/scen trafdir=$simdir/trafic when i execute the simulation file .sh it shows me this error num_nodes is set 50 couldn't open "gpsrsimulation/GPSR.tr": no such file or directory while executing "open $opt(tr) w" invoked from within "set tracefd [open $opt(tr) w]" (file "simulation.tcl" line 166) tail: cannot open `statfile' for reading: No such file or directory How can i deal with this error? Thank you ZAK