Hi Taylor, I really appreciate you getting back to me so quickly. I am currently running on Ubuntu 18.04.2 LTS (bionic) from windows in an oracle virtual box. If this helps; for your information - preceding step 1 below I ran the following commands to install the compilers/header files etc as instructed on the website (hopefully I haven't missed anything here, or haven't added anything that might conflict with each other). sudo apt-get update sudo apt-get upgrade sudo apt get install build-essential gcc -v make -v sudo apt-get install expat sudo apt-get install libexpat1-dev sudo apt-get install libx11-dev sudo apt-get install libx11-6 sudo apt-get install libgl-dev which was (libgl1-mesa-dev) sudo apt-get install zlib1g sudo apt-get install zlib1g-dev Installation checked with command apt-cache policy "" Thanks in advance. Best wishes, Jolyon ######################################################################## To unsubscribe from the FSL list, click the following link: https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=FSL&A=1