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

[John Petrich]

Thanks Marcus yet again.  In the past gr-osmosdr simply built seamlessly
along with gnuradio.  Not this time.  Don't know why.  My solution was to
delete the gr-osmosdr files from the home directory and git clone from the
Osmosdr website.  The installation went smoothly and the RTL SDR receiver
demos all run as expected.  Just in time.  And, I'll not throttle again
against the Qt GUI block.

Regards,
John Petrich

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

Marcus Leech:

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gr-osmosdr you're using is out-of-date with respect to the GR that is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.