This has been a puzzling bug for me too on my Ubuntu 18.4 64-bit laptop, which is my cruising mainstay below decks. Both it and and the RPi-3B+ (running on OpenPlotter, latest) are set up with OpenCPN 5.0.0, and both have the updated pypilot plugin 0.9 . However, the "429496" error only shows up on the Ubuntu laptop. The buttons have always worked correctly on the OpenPlotter Rasberry pi system.
I made the above-described code change on the Ubuntu laptop in /usr/local/include/pypilot_pi/src/PypilotDialog.cpp.
Then I restarted OpenCPN, but didn't realize I'd need to rebuild the plug-in, so no-go.
After rebuilding the plug-in, the bug is gone on the opencpn pypilot plug-in running on the Ubuntu 18.4 x64 laptop.
Many thanks for fixing this bug!!
I made the above-described code change on the Ubuntu laptop in /usr/local/include/pypilot_pi/src/PypilotDialog.cpp.
Then I restarted OpenCPN, but didn't realize I'd need to rebuild the plug-in, so no-go.
After rebuilding the plug-in, the bug is gone on the opencpn pypilot plug-in running on the Ubuntu 18.4 x64 laptop.
Many thanks for fixing this bug!!