Baffled!

[rani...@gmail.com]

I've been using SparkSDR to control a HL2 for so long without a hitch I'm baffled about why it suddenly quit doing so.  I hadn't made any changes and initially it did run for a few seconds but since then the main screen comes up as it should but there's no audio or waterfall.   It's always been recognized at the same IP address and repeating Discovery has no effect.   I know I've got an IP connection to the hub it's running from and the LEDs are flickering.

I've since downloaded the latest version but it behaves the same way.   The errorlog isn't much help to me as it sometimes has 0 bytes, but here's one that was created earlier:

12/6/2025 1:30:12 PM v2.0.991.0
Populate C:\Users\User\AppData\Roaming\m0nnb\SparkSDR2\settingshpsdr_0-28-192-162-19-221
Object reference not set to an instance of an object.
SparkSDR
Void LoadFilter(System.String)
   at radio.HpsdrRadio.LoadFilter(String)
   at radio.HpsdrRadio.Populate(Utf8JsonReader&)
   at radio.HpsdrRadio.Populate(String, String)
--

I can start and stop the program reliably and made sure my normal audio device was selected and other apps do produce audio.    And I've tried the usual all-purpose Windows fixit - rebooted.   Have a feeling I'm still missing something obvious.

Thanks for any suggestions,

73, Bob W9RAN

[Luc Laureys]

Hey Bob,

suggestion...Use SDR++Brown...to see if your HL2 works fine...This version of SDR++ do works with the HL2..The  "original" SDR++ dont.

or....SDR Console from Simon Works great....

Greetings

ON7KEC

Op zaterdag 6 december 2025 om 21:28:00 UTC+1 schreef rani...@gmail.com:

[rani...@gmail.com]

Good suggestion - rather than introduce a new piece of software and it's variables I just updated Thetis and it's working fine.   So whatever is going on seems to definitely be a SparkSDR issue.    

[rani...@gmail.com]

And now - SparkSDR is working again!   Still baffled but now in a good way ;-)