Re: [Discuss-gnuradio] RTL SDR and GRC3.7.8 problem: format error

On 08/24/2015 02:26 PM, John Petrich wrote:

Ever since I updated to GRC3.7.8 none of my RTL SDR demos will run in GRC.  The error messages are the same: " list contains an invalid format".  Attached is the .grc file of a basic RTL Qt test flow graph authored using GRC3.7.8, and the .odt file with the complete error message.  GRC detects the RTL device, and cites format errors.   Are others having this problem with GRC3.7.8?  I am anxious to resolve this problem because I have scheduled a GRC presentation in the near future.

 

Regards,

John Petrich

Did you re-build gr-osmosdr against 3.7.8?  My suspicion is that the gr-osmosdr you're using is out-of-date with respect to the GR that is calling it.

Also, you have a throttle block in between your hardware source, and your Qt GUI block.  Don't do that.  You never need a throttle when you're using
  real hardware.