HDHomeRun issue

[sbiddle]

I've got a new Win 8.1 box that I'm planning on migrating my install over to. I'm having trouble getting my HDHomeRun to scan for channels.

This is something I've done many times before on many different machines so I'm aware of the most common issue being the Windows Firewall - but with this disabled it still won't work.

I'm seeing this in the log

2014-09-27 10:00:32.379 [INFO][1] Creating BDA graph
2014-09-27 10:00:32.382 [DEBUG][1] Using tuner Silicondust HDHomeRun Tuner 1110C493-0 (1)
2014-09-27 10:00:32.382 [INFO][1] [00002a30-ff00-ffff-0000000004000000]-02e5c098-02ab6e54
2014-09-27 10:00:32.387 [DEBUG][1] About to auto detect capture filter...
2014-09-27 10:00:32.387 [DEBUG][1] Skipping capture filter detection
2014-09-27 10:00:32.387 [DEBUG][1] No BDA capture filter for this device
2014-09-27 10:00:32.389 [DEBUG][1] Activating time machine
2014-09-27 10:00:32.389 [DEBUG][1] Time machine activated...
2014-09-27 10:00:32.399 [DEBUG][1] EIT collection started
2014-09-27 10:00:32.399 [DEBUG][1] Graph filter list:
2014-09-27 10:00:32.399 [DEBUG][1] - MPEG-2 Sections and Tables
2014-09-27 10:00:32.399 [DEBUG][1] - BDA MPEG2 Transport Information Filter
2014-09-27 10:00:32.399 [DEBUG][1] - MPEG-2 Demultiplexer
2014-09-27 10:00:32.399 [DEBUG][1] - NPVR TS Mon
2014-09-27 10:00:32.399 [DEBUG][1] - Tuner
2014-09-27 10:00:32.399 [DEBUG][1] - Network Provider
2014-09-27 10:00:32.399 [INFO][1] About to start BDA graph
2014-09-27 10:00:32.399 [DEBUG][1] Starting graph...
2014-09-27 10:00:32.400 [DEBUG][1] About to tune BDA graph:
<tuning>
<type>DVB-T</type>
<locator>
<frequency>562000</frequency>
<bandwidth>8</bandwidth>
</locator>
</tuning>

2014-09-27 10:00:32.400 [DEBUG][1] DigitalRecorderDVBT::Tune@1
2014-09-27 10:00:32.400 [DEBUG][1] DigitalRecorderDVBT::Tune@2
2014-09-27 10:00:32.400 [DEBUG][1] DigitalRecorderDVBT::Tune@3
2014-09-27 10:00:32.400 [DEBUG][1] DigitalRecorderDVBT::Tune@4
2014-09-27 10:00:32.404 [DEBUG][1] DigitalRecorderDVBT::Tune@5
2014-09-27 10:00:32.404 [DEBUG][1] DigitalRecorderDVBT::Tune@6
2014-09-27 10:00:32.502 [DEBUG][1] DigitalRecorderDVBT::Tune@7
2014-09-27 10:00:32.502 [DEBUG][1] whoosh whoosh
2014-09-27 10:00:32.502 [DEBUG][1] Calling LockChannel()
2014-09-27 10:00:33.433 [DEBUG][1] locked=1, present=1, strength=86, quality=100 (took 922ms to check)
2014-09-27 10:00:33.433 [ERROR][1] Unexpected error in scanning form: System.NullReferenceException: Object reference not set to an instance of an object.
at Native.DigitalRecorderDVBT.Tune(String tuning)
at NShared.DigitalRecorder.StartStream(ChannelMapping channelMapping, String target, String& reason)
at NShared.DigitalScanningForm.StartScanning()
at NShared.DigitalScanningForm.DigitalScanningForm_Load(Object sender, EventArgs e)
at System.Windows.Forms.Form.OnLoad(EventArgs e)
at System.Windows.Forms.Form.OnCreateControl()
at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
at System.Windows.Forms.Control.CreateControl()
at System.Windows.Forms.Control.WmShowWindow(Message& m)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
at System.Windows.Forms.ContainerControl.WndProc(Message& m)
at System.Windows.Forms.Form.WmShowWindow(Message& m)
at System.Windows.Forms.Form.WndProc(Message& m)
at NShared.DigitalScanningForm.WndProc(Message& m)
2014-09-27 10:00:46.468 [DEBUG][1] raw message: 5
2014-09-27 10:00:47.532 [DEBUG][1] raw message: 5
2014-09-27 10:00:50.053 [DEBUG][1] raw message: 5
2014-09-27 10:00:52.188 [DEBUG][1] raw message: 5
2014-09-27 10:00:53.595 [DEBUG][1] raw message: 5
2014-09-27 10:01:04.756 [DEBUG][1] raw message: 5

Anybody have any ideas what could be causing this?

[sub]

I've made a change for the next build which should stop the exception shown in the logs, but it shouldn't be happening anyway unless there is something wrong with the BDA drivers.