octoprint.log to aid in the description of the Line Number is not Last Line Number+1 error.

octoprint.log

2014-11-29 16:16:59,396 - octoprint.server.util - INFO - New connection from client: 192.168.0.3
2014-11-29 21:06:03,726 - octoprint - ERROR - Exception on /ajax/control/job [POST]
Traceback (most recent call last):
  File "/home/pi/oprint/local/lib/python2.7/site-packages/Flask-0.9-py2.7.egg/flask/app.py", line 1687, in wsgi_app
    response = self.full_dispatch_request()
  File "/home/pi/oprint/local/lib/python2.7/site-packages/Flask-0.9-py2.7.egg/flask/app.py", line 1360, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/home/pi/oprint/local/lib/python2.7/site-packages/Flask-0.9-py2.7.egg/flask/app.py", line 1358, in full_dispatch_request
    rv = self.dispatch_request()
  File "/home/pi/oprint/local/lib/python2.7/site-packages/Flask-0.9-py2.7.egg/flask/app.py", line 1344, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/home/pi/oprint/local/lib/python2.7/site-packages/OctoPrint-1.0.0-py2.7.egg/octoprint/server/util.py", line 40, in decorated_view
    return login_required(func)(*args, **kwargs)
  File "/home/pi/oprint/local/lib/python2.7/site-packages/Flask_Login-0.2.2-py2.7.egg/flask_login.py", line 637, in decorated_view
    return func(*args, **kwargs)
  File "/home/pi/oprint/local/lib/python2.7/site-packages/OctoPrint-1.0.0-py2.7.egg/octoprint/server/ajax/control.py", line 75, in printJobControl
    printer.startPrint()
  File "/home/pi/oprint/local/lib/python2.7/site-packages/OctoPrint-1.0.0-py2.7.egg/octoprint/printer.py", line 222, in startPrint
    self._comm.startPrint()
  File "/home/pi/oprint/local/lib/python2.7/site-packages/OctoPrint-1.0.0-py2.7.egg/octoprint/util/comm.py", line 344, in startPrint
    raise ValueError("No file selected for printing")
ValueError: No file selected for printing
2014-11-29 21:11:05,754 - octoprint.util.comm - WARNING - Printer requested line 33 but no sufficient history is available, can't resend
2014-11-29 21:29:30,333 - octoprint.server.util - INFO - Closed client connection
2014-11-29 21:29:38,563 - octoprint.server.util - INFO - New connection from client: 192.168.0.3
2014-11-29 21:17:27,205 - octoprint.server - INFO - Listening on http://0.0.0.0:5000
2014-11-30 02:28:54,763 - octoprint.server.util - INFO - New connection from client: 192.168.0.3
2014-11-30 02:42:15,295 - octoprint.util.comm - WARNING - Printer requested line 32 but no sufficient history is available, can't resend
2014-11-29 21:17:26,848 - octoprint.server - INFO - Listening on http://0.0.0.0:5000
2014-11-30 02:53:30,167 - octoprint.server.util - INFO - New connection from client: 192.168.0.3
2014-11-30 02:57:25,639 - octoprint.server.util - INFO - Closed client connection
2014-11-30 02:57:29,575 - octoprint.server.util - INFO - New connection from client: 192.168.0.3