Dear all, I posted this problem a couple of days ago through phenix help mail address but I got no answer (not sure if it was delivered properly). Maybe here I am luckier. I have recently upgrade my machine to Ubuntu MATE 1.26 and re-install all crystallography software I often use, including Phenix version dev-5493. I am working in a structure of a protein bound to a new ligand. I built the ligand with chemDraw, get the SMILE, get a universal SMILE string in cactus.nci.nih.gov http://cactus.nci.nih.gov/, and used eLbow for ligand restraints generation and optimization (using default parameters). First problem. When I try to open the ligand in REEL. Phenix crash with the following message in the terminal libGL error: MESA-LOADER: failed to open nouveau: /usr/lib/dri/nouveau_dri.so http://nouveau_dri.so/: cannot open shared object file: No such file or directory (search paths /usr/lib/x86_64-linux-gnu/dri:\$${ORIGIN}/dri:/usr/lib/dri, suffix _dri) libGL error: failed to load driver: nouveau libGL error: MESA-LOADER: failed to open nouveau: /usr/lib/dri/nouveau_dri.so http://nouveau_dri.so/: cannot open shared object file: No such file or directory (search paths /usr/lib/x86_64-linux-gnu/dri:\$${ORIGIN}/dri:/usr/lib/dri, suffix _dri) libGL error: failed to load driver: nouveau libGL error: MESA-LOADER: failed to open swrast: /usr/lib/dri/swrast_dri.so http://swrast_dri.so/: cannot open shared object file: No such file or directory (search paths /usr/lib/x86_64-linux-gnu/dri:\$${ORIGIN}/dri:/usr/lib/dri, suffix _dri) libGL error: failed to load driver: swrast The program 'main.py' received an X Window System error. This probably reflects a bug in the program. The error was 'BadValue'. (Details: serial 39668 error_code 2 request_code 152 minor_code 24) (Note to programmers: normally, X errors are reported asynchronously; that is, you will receive the error a while after causing it. To debug your program, run it with the --sync command line option to change this behavior. You can then get a meaningful backtrace from your debugger if you break on the gdk_x_error() function.) Second, when I open the structure in Coot (0.9.8.95) from Phenix and try to perform real space refine zone to the ligand, the attached window pops-up. Is this because I did something wrong during the installation? Is there a bug I am not aware of? Any help will be really appreciate. Many thanks in advance, Marian 
