Hi [MacOSX 10.4.6, emacs 22.0.50.1, ess 5.3.0, R-2.3.0, gcc version 4.0.1 (Apple Computer, Inc. build 5247] Using R-2.3.0 with ESS, I get a repeatable crash trying to open an X11 window. Cut-n-paste session follows: > X11("octopus:0.0") Error: Couldn't find per display information Process R exited abnormally with code 1 at Tue Apr 25 09:12:14 2006 what's going on here? [I don't get this running R from a terminal] -- Robin Hankin Uncertainty Analyst National Oceanography Centre, Southampton European Way, Southampton SO14 3ZH, UK tel 023-8059-7743