I think u r laoding the mobility file for which the given path is incorrect...........check ur mobility file path...
Muhammad Saleem Khan Ph.D(CS) , COMSATS Institute of Information Technology, Islamabad. Cell No# 0346-9754454 ________________________________ From: Siraj Ul Muneer <si...@inbox.pk> To: ns-users@ISI.EDU Sent: Wednesday, November 7, 2012 8:19 PM Subject: [ns] LAR code error Dear NS Users when i run my LAR code i found the folowing errors plz guide me how to tackle this problem thank you setting initial variables... setting other default settings... removing unecessary packet headers... num_nodes is set 50 creating channel... setting global node values... creating the nodes... INITIALIZE THE LIST xListHead Loading the mobility file... couldn't read file "": no such file or directory while executing "source.orig {}" ("uplevel" body line 1) invoked from within "uplevel source.orig [list $fileName]" invoked from within "if [$instance_ is_http_url $fileName] { set buffer [$instance_ read_url $fileName] uplevel eval $buffer } else { uplevel source.orig [list $fileName] ..." (procedure "source" line 8) invoked from within "source $val(sc)" (file "step.tcl" line 164) Siraj Ul Muneer MS(CS), CCAI CCNP(R&S), ISCW, CCNA, JNCIA-ER, RHCE(Training)