Build failed.

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Ponraj Kumar

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Jan 19, 2015, 8:32:55 AM1/19/15
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Hi I have installed ns3 successfully long time ago. I was working on various modules before I got this error today. 

I want to know what could be the reason for getting this error and how to resolve it.

Error is :build failed.

Traceback (most recent call last):
  File "/home/ponraj/Documents/ns3_downloaded/sim_test/ns-3.20/.waf-1.7.13-5a064c2686fe54de4e11018d22148cfc/waflib/Runner.py", line 162, in start
    st=tsk.runnable_status()
  File "/home/ponraj/Documents/ns3_downloaded/sim_test/ns-3.20/.waf-1.7.13-5a064c2686fe54de4e11018d22148cfc/waflib/Task.py", line 289, in runnable_stat
us
    new_sig=self.signature()
  File "/home/ponraj/Documents/ns3_downloaded/sim_test/ns-3.20/.waf-1.7.13-5a064c2686fe54de4e11018d22148cfc/waflib/Task.py", line 274, in signature
    self.sig_explicit_deps()
  File "/home/ponraj/Documents/ns3_downloaded/sim_test/ns-3.20/.waf-1.7.13-5a064c2686fe54de4e11018d22148cfc/waflib/Task.py", line 325, in sig_explicit_
deps
    upd(x.get_bld_sig())
  File "/home/ponraj/Documents/ns3_downloaded/sim_test/ns-3.20/.waf-1.7.13-5a064c2686fe54de4e11018d22148cfc/waflib/Node.py", line 461, in get_bld_sig
    self.sig=Utils.h_file(self.abspath())
  File "/home/ponraj/Documents/ns3_downloaded/sim_test/ns-3.20/.waf-1.7.13-5a064c2686fe54de4e11018d22148cfc/waflib/Utils.py", line 106, in h_file
    fname=f.read(200000)
IOError: [Errno 5] Input/output error

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