When converting a .docx to a PDF using the --headless, --invisible, and both flags at the same time, I got the following:
Failed to open display
/opt/libreoffice4.4/program/soffice.bin: error while loading shared libraries: libGL.so.1: cannot open shared object file: No such file or directory
When I was using Libreoffice 4.0.4.2 the command worked without any problems and I am unsure of what I am doing wrong. I should also note that this is a server install, there is no graphics display.
(This is 64 Bit)