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Stuart, Are you logged-in as root or are you working in a root shell ( using su or sudo)? Depending on your security settings X-windows may not permit a program that is run from a root shell to access the display, which belongs to the user logged-in through X-windows. I get around the administrator access issue by installing CCP4, and all other non-OS software, with non-root ownership, a non-root administrator account, which shares the environment with all other users. For one thing, I do not want to source the multitude of /etc/csh.cshrc and .bashrc files as root. I am sure that others have different, and probably more elegant, solutions to this problem. PS. It also seems that the TCL/TK environment is not set in the root shell you are using. Good luck, Mark On Mon, 2009-12-14 at 16:51 -0600, Stuart Endostreeter wrote: > Fellow users, > > I just installed v6.1.2 on Ubuntu 9.0.4 today and have run into the > following problem when I try to run ccp4i for the first time as root > to configure the program: > > root@########:/home/########/Documents# ccp4i > No protocol specified > Application initialization failed: couldn't connect to display ":0.0" > Error in startup script: can't read "tk_version": no such variable > while executing > "catch "set system(TK_VERSION) $tk_version"" > (file "/usr/local/ccp4/ccp4-6.1.2/ccp4i/bin/ccp4i.tcl" line 1) > (file "/usr/local/ccp4/ccp4-6.1.2//bin/ccp4i" line 1) > > The odd thing is that I can launch ccp4i just fine as a regular user, > but then of course I get the message about the first time ccp4i has > been run and the need to configure it, which requires administrator > level access. > > > Anyone have any ideas? > > > Thanks, > Stuart Endo-Streeter Yours sincerely, Mark A. White, Ph.D. Assistant Professor, Dept. Biochemistry and Molecular Biology, Manager, Sealy Center for Structural Biology and Molecular Biophysics X-ray Crystallography Laboratory, Basic Science Building, Room 6.660 C University of Texas Medical Branch Galveston, TX 77555-0647 Tel. (409) 747-4747 Cell. (409) 539-9138 Fax. (409) 747-4745 mailto:[log in to unmask] http://xray.utmb.edu http://xray.utmb.edu/~white