problem about run run_all_traces.py

[JyugoFon]

I have meet the similar problem when i run run_all_traces.py , it will stay a state as follows:
**net.ipv4.ip_forward = 1
**
and when i "ctrl + c" to stop it , it will show as follows:
**
net.ipv4.ip_forward = 1
^CTraceback (most recent call last):
File "run_traces.py", line 49, in
main()
File "run_traces.py", line 36, in main
Traceback (most recent call last):
(out, err) = proc.communicate()
File "/usr/lib/python2.7/subprocess.py", line 800, in communicate
File "run_traces.py", line 49, in
Traceback (most recent call last):
File "run_all_traces.py", line 77, in
main()
File "run_traces.py", line 36, in main
proc_BB.wait()
(out, err) = proc.communicate()
File "/usr/lib/python2.7/subprocess.py", line 1392, in wait
File "/usr/lib/python2.7/subprocess.py", line 800, in communicate
return self._communicate(input)
File "/usr/lib/python2.7/subprocess.py", line 1417, in _communicate
Traceback (most recent call last):
File "run_traces.py", line 49, in
return self._communicate(input)
main()
File "/usr/lib/python2.7/subprocess.py", line 1417, in _communicate
File "run_traces.py", line 34, in main
stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
File "/usr/lib/python2.7/subprocess.py", line 711, in init
pid, sts = _eintr_retry_call(os.waitpid, self.pid, 0)
File "/usr/lib/python2.7/subprocess.py", line 476, in _eintr_retry_call
stdout, stderr = self._communicate_with_poll(input)
Traceback (most recent call last):
File "/usr/lib/python2.7/subprocess.py", line 1471, in _communicate_with_poll
File "run_traces.py", line 49, in
errread, errwrite)
return func(*args)
File "/usr/lib/python2.7/subprocess.py", line 1319, in _execute_child
KeyboardInterrupt
Traceback (most recent call last):
stdout, stderr = self._communicate_with_poll(input)
File "/usr/lib/python2.7/subprocess.py", line 1471, in _communicate_with_poll
File "run_traces.py", line 49, in
main()
File "run_traces.py", line 36, in main
(out, err) = proc.communicate()
File "/usr/lib/python2.7/subprocess.py", line 800, in communicate
ready = poller.poll()
data = _eintr_retry_call(os.read, errpipe_read, 1048576)
KeyboardInterrupt File "/usr/lib/python2.7/subprocess.py", line 476, in _eintr_retry_call

return self._communicate(input)

File "/usr/lib/python2.7/subprocess.py", line 1417, in _communicate
return func(*args)
ready = poller.poll()
KeyboardInterruptKeyboardInterrupt

main()

File "run_traces.py", line 34, in main
stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
File "/usr/lib/python2.7/subprocess.py", line 711, in init
Traceback (most recent call last):
File "run_traces.py", line 49, in
main()
File "run_traces.py", line 36, in main
(out, err) = proc.communicate()
stdout, stderr = self._communicate_with_poll(input)
File "/usr/lib/python2.7/subprocess.py", line 800, in communicate
File "/usr/lib/python2.7/subprocess.py", line 1471, in _communicate_with_poll
return self._communicate(input)
File "/usr/lib/python2.7/subprocess.py", line 1417, in _communicate
ready = poller.poll()
KeyboardInterrupt
stdout, stderr = self._communicate_with_poll(input)
File "/usr/lib/python2.7/subprocess.py", line 1471, in _communicate_with_poll
ready = poller.poll()
KeyboardInterrupt
errread, errwrite)
File "/usr/lib/python2.7/subprocess.py", line 1319, in _execute_child
Traceback (most recent call last):
File "run_traces.py", line 49, in
main()
File "run_traces.py", line 36, in main
(out, err) = proc.communicate()
File "/usr/lib/python2.7/subprocess.py", line 800, in communicate
return self._communicate(input)
File "/usr/lib/python2.7/subprocess.py", line 1417, in _communicate
stdout, stderr = self._communicate_with_poll(input)
File "/usr/lib/python2.7/subprocess.py", line 1471, in _communicate_with_poll
data = _eintr_retry_call(os.read, errpipe_read, 1048576)
File "/usr/lib/python2.7/subprocess.py", line 476, in _eintr_retry_call
return func(*args)
KeyboardInterrupt
ready = poller.poll()
Traceback (most recent call last):
KeyboardInterrupt
File "run_traces.py", line 49, in
main()
File "run_traces.py", line 34, in main
stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
File "/usr/lib/python2.7/subprocess.py", line 711, in init
errread, errwrite)
File "/usr/lib/python2.7/subprocess.py", line 1319, in _execute_child
data = _eintr_retry_call(os.read, errpipe_read, 1048576)
File "/usr/lib/python2.7/subprocess.py", line 476, in _eintr_retry_call
return func(*args)
KeyboardInterrupt
**
i try to solve this problem for a long time but didn't success , can you help me ?
Thank you for taking time out of your busy schedule to guide me!