Thanks for that. So libharfbuzz needs the symbol, and it asks for the library that provides it. That's good. What does "ldd /usr/bin/gnuplot-x11" say? And can you confirm that running "/usr/bin/gnuplot-x11" gives you the "symbol lookup error"? If some other command gives you the "symbol lookup error", can I get the output of "ldd that-other-command"?
Thanks much

