Hi Jim! How did you install gnuradio 3.10.11 ? If you had 3.10.11 installed, you did not had to run it from the source directory. So you did not install 3.10.11. I suspect you downloaded the source code from somewhere, but missed to build and install it.
How did you get 3.9.4 ? I recommend to read the gnuradio installation docs. https://wiki.gnuradio.org/index.php?title=InstallingGR -- Volker
