P4wnP1 shell (client not connected) > FireStage1

Starting to type out stage1 to the target...
Traceback (most recent call last):
  File "P4wnP1.py", line 1346, in 
    p4wnp1.cmdloop()
  File "/usr/lib/python2.7/cmd.py", line 142, in cmdloop
    stop = self.onecmd(line)
  File "/usr/lib/python2.7/cmd.py", line 221, in onecmd
    return func(arg)
  File "P4wnP1.py", line 746, in do_FireStage1
    self.stage1_trigger(trigger_type=trigger_type, trigger_delay_ms=trigger_delay_ms, hideTargetWindow = hideTargetWindow, bypassUAC=bypassUAC)
  File "P4wnP1.py", line 466, in stage1_trigger
    self.duckencoder.outhidDuckyScript(ps_stub) # print DuckyScript stub
  File "/home/pi/P4wnP1/hidtools/backdoor/DuckEncoder.py", line 428, in outhidDuckyScript
    self.out2hid(payload)
  File "/home/pi/P4wnP1/hidtools/backdoor/DuckEncoder.py", line 398, in out2hid
    f.flush()
IOError: [Errno 4] Interrupted system call
Cleaning Up...
LinkLayer: Aborting sync