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Old 05-29-2012, 11:11 PM   #1
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i have a new problem with ns2

i got the error below when i using the ns2 to scenario my protocol

Starting program: /usr/local/bin/ns sim.tcl
num_nodes is set 25
Loading scenario file...

Program received signal SIGSEGV, Segmentation fault.
0x0829c00b in MobileNode::update_position() ()

who can help to fix it ,thank you !!!!!!!
Old 05-30-2012, 01:56 AM   #2
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Looks like the NS guys f*d up; segfaults aren't supposed to happen in good releases. You should report it as a bug.

But, to answer your question, try one of these:

strace /usr/local/bin/ns sim.tcl
gdb --args /usr/local/bin/ns sim.tcl
# type run, then bt
valgrind /usr/local/bin/ns sim.tcl
Then use your Googling skills to figure out what's wrong, based on the information those things return.

Also, double check your input file. You might be passing a bad value to update_position().
Old 05-30-2012, 08:07 AM   #3
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i have fixed the problem already ..
thank you very much
Old 06-01-2012, 12:14 PM   #4
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Originally Posted by edison_0927 View Post
i have fixed the problem already ..
Then list your fix for others please.


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