Thanks dbcat and rgleason,
The possibility of the Options dialog blocking output seemed promising but I have run into even more trouble while trying to test your suggestions. I am now getting a partial crash of OpenCPN
even when I try to activate a route
or change to an output. If I start OpenCPN
from terminal then at this point I get a terminal message:
(opencpn:1514): Gtk-CRITICAL *.*: IA_gtk_widget_set_size_request: assertion 'width >= -1' failed
OpenCPN does not crash completely but the incoming stream seems to close (grey ship and nothing in nmea
Looking at the logbook the main thing that appears is that it is trying to load the World Chart every second. I think this is the main problem as the activity is blocking other things.
After a frustrating morning with performance much worse than yesterday I now suddenly see EC messages streaming through KPLEX on my multiplexer RPi though the ship on OpenCPN is greyed out.
I will try reinstalling from scratch and will come back to you when I am back up and running. Visitors coming today so I can't get it done today.
When I installed OpenCPN 4.2 I only loaded a few test charts
and I have now found that the loading World Chart problem occurs while the screen
is zoomed such that part of the world chart is visible. Zooming in to exclude the World Chart seems to clear the problem.
I have to do a bit more testing and I'll try to send a copy of my log file but got to go now.
Thanks again for the help