Hi All...
I am running a simulation of ad hoc replication based on clustering ,using
AODV protocol , and every time I try to run the simulation I get a
segmentation fault.
is there any one who can tell me why this error happened and what is it ?

here is the TCL script:
# ======================================================================
# Define options
# ======================================================================
set opt(chan)           Channel/WirelessChannel    ;# channel type
set opt(prop)           Propagation/TwoRayGround   ;# radio-propagation
model
set opt(netif)          Phy/WirelessPhy            ;# network interface type
set opt(mac)            Mac/802_11                 ;# MAC type
set opt(ifq)            Queue/DropTail/PriQueue    ;# interface queue type
set opt(ll)             LL                         ;# link layer type
set opt(ant)            Antenna/OmniAntenna        ;# antenna model
set opt(ifqlen)         50                         ;# max packet in ifq
set opt(nn)             14                         ;# number of mobilenodes
set opt(adhocRouting)   AODV                       ;# routing protocol

set opt(cp)             ""                         ;# connection pattern
file
set opt(sc)         "./scene-14-cluster"       ;# node movement file.

set opt(x)      670                            ;# x coordinate of topology
set opt(y)      670                            ;# y coordinate of topology
set opt(seed)   0.0                            ;# seed for random number
gen.
set opt(stop)   100                            ;# time to stop simulation

#
============================================================================
# check for boundary parameters and random seed
if { $opt(x) == 0 || $opt(y) == 0 } {
    puts "No X-Y boundary values given for wireless topology\n"
}
if {$opt(seed) > 0} {
    puts "Seeding Random number generator with $opt(seed)\n"
    ns-random $opt(seed)
}

# create simulator instance
set ns_   [new Simulator]

# set up for hierarchical routing
$ns_ node-config -addressType hierarchical
AddrParams set domain_num_ 1           ;# number of domains
lappend cluster_num 3                ;# number of clusters in each domain
AddrParams set cluster_num_ $cluster_num
lappend eilastlevel 4 5 5               ;# number of nodes in each cluster
AddrParams set nodes_num_ $eilastlevel ;# of each domain

set tracefd  [open cluster14-out.tr w]
set namtrace [open cluster14-out.nam w]
$ns_ trace-all $tracefd
$ns_ namtrace-all-wireless $namtrace $opt(x) $opt(y)

# Create topography object
set topo   [new Topography]

# define topology
$topo load_flatgrid $opt(x) $opt(y)

# create God
create-god [expr $opt(nn)]

set channel1 [new $opt(chan)]

# configure for base-station node
$ns_ node-config -adhocRouting $opt(adhocRouting) \
                 -llType $opt(ll) \
                 -macType $opt(mac) \
                 -ifqType $opt(ifq) \
                 -ifqLen $opt(ifqlen) \
                 -antType $opt(ant) \
                 -propType $opt(prop) \
                 -phyType $opt(netif) \
                 -channel $channel1 \
         -topoInstance $topo \
                 -wiredRouting OFF \
         -agentTrace ON \
                 -routerTrace ON \
                 -macTrace ON

#create base-station node
set temp {0.0.0 0.0.1 0.0.2 0.0.3 0.1.0 0.1.1 0.1.2 0.1.3 0.1.4 0.2.0 0.2.1
0.2.2 0.2.3 0.2.4}
;# hier address to be used for wireless
;# domain

# create mobilenodes in the same domain as BS(0)
# note the position and movement of mobilenodes is as defined
# in $opt(sc)

#configure for mobilenodes
$ns_ node-config -wiredRouting OFF

  for {set j 0} {$j < $opt(nn)} {incr j} {
    set node_($j) [ $ns_ node [lindex $temp $j]]
}


# Traffic

set ping_(0) [new Agent/Ping]
$ns_ attach-agent $node_(6) $ping_(0)

set ping_(1) [new Agent/Ping]
$ns_ attach-agent $node_(5) $ping_(1)

#Connect the two agents
$ns_ connect $ping_(0) $ping_(1)

#Schedule events
$ns_ at 5.0 "$ping_(0) send0"
$ns_ at 6.0 "finish"


# source connection-pattern and node-movement scripts
if { $opt(cp) == "" } {
    puts "*** NOTE: no connection pattern specified."
        set opt(cp) "none"
} else {
    puts "Loading connection pattern..."
    source $opt(cp)
}
if { $opt(sc) == "" } {
    puts "*** NOTE: no scenario file specified."
        set opt(sc) "none"
} else {
    puts "Loading scenario file..."
    source $opt(sc)
    puts "Load complete..."
}

# Define initial node position in nam

for {set i 0} {$i < $opt(nn)} {incr i} {

    # 20 defines the node size in nam, must adjust it according to your
    # scenario
    # The function must be called after mobility model is defined

    $ns_ initial_node_pos $node_($i) 20
}

# Tell all nodes when the simulation ends
for {set i } {$i < $opt(nn) } {incr i} {
    $ns_ at $opt(stop).0 "$node_($i) reset";
}

$ns_ at $opt(stop).0002 "puts \"NS EXITING...\" ; $ns_ halt"
$ns_ at $opt(stop).0001 "stop"
proc stop {} {
    global ns_ tracefd namtrace
    $ns_ flush-trace
    close $tracefd
    close $namtrace
}

# informative headers for CMUTracefile  #Disabled y Talal
puts $tracefd "M 0.0 nn $opt(nn) x $opt(x) y $opt(y) rp \
    $opt(adhocRouting)"
puts $tracefd "M 0.0 sc $opt(sc) cp $opt(cp) seed $opt(seed)"
puts $tracefd "M 0.0 prop $opt(prop) ant $opt(ant)"

#added by Talal
proc stop {} {
        global ns_ namtrace tracefd
        $ns_ flush-trace
        close $tracefd
        close $namtrace
}


puts "Starting Simulation..."
$ns_ run

Thank you for your attention

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