[ns] What does the error "Segmentation Fault" means and how dis error can be rectified.......

[veronica diaza]

Hiiii ns-users....If any of you guys know what does the error
"segmentation fault" means and how this error can be solved, please
send me the solution and links if you have any regarding this....I am
trying to simulate a scenario for a 650 seconds...After simulating for
16 seconds , I have a error saying "Segmentation Fault". I am getting
a trace file but only for that 16 seconds.....please help me regarding
this so that i can get the trace file completely for my simulation
time of 650 seconds.....Any help is greatly appreciated. Thanks in
advance.