(superkuh)-(jobs:0)-(~/app_installs/sdr/pyrtlsdr/Feb-2013/pyrtlsdr)
(! 2767)-> python rtlsdr_scan.py
Traceback (most recent call last):
  File "rtlsdr_scan.py", line 827, in on_start
    self.scan_start(False)
  File "rtlsdr_scan.py", line 973, in scan_start
    self.settings.stop)
ValueError: zero length field name in format
Found Elonics E4000 tuner
Exact sample rate is: 2000000.052982 Hz
Traceback (most recent call last):
  File "rtlsdr_scan.py", line 862, in on_thread_status
    self.draw_plot()
  File "rtlsdr_scan.py", line 1016, in draw_plot
    self.settings.stop))
ValueError: zero length field name in format
Traceback (most recent call last):
  File "/usr/lib/pymodules/python2.6/matplotlib/backends/backend_wx.py", line 1316, in _onMotion
    FigureCanvasBase.motion_notify_event(self, x, y, guiEvent=evt)
  File "/usr/lib/pymodules/python2.6/matplotlib/backend_bases.py", line 1245, in motion_notify_event
    self.callbacks.process(s, event)
  File "/usr/lib/pymodules/python2.6/matplotlib/cbook.py", line 163, in process
    func(*args, **kwargs)
  File "rtlsdr_scan.py", line 550, in on_motion
    text = "f = {:.3f}MHz, p = {:.2f}dB".format(xpos, ypos)
ValueError: zero length field name in format
Traceback (most recent call last):
  File "/usr/lib/pymodules/python2.6/matplotlib/backends/backend_wx.py", line 1316, in _onMotion
    FigureCanvasBase.motion_notify_event(self, x, y, guiEvent=evt)
  File "/usr/lib/pymodules/python2.6/matplotlib/backend_bases.py", line 1245, in motion_notify_event
    self.callbacks.process(s, event)
  File "/usr/lib/pymodules/python2.6/matplotlib/cbook.py", line 163, in process
    func(*args, **kwargs)
  File "rtlsdr_scan.py", line 550, in on_motion
    text = "f = {:.3f}MHz, p = {:.2f}dB".format(xpos, ypos)

# ... and so on, especially when the live update is enabled as it is here.