<html><body> Dear GATE users, I can not install Gate3.0.0 in my new 64bit computer (Red Hat Enterprise Linux 4 WS). I have the error messages: "...Linking Gate... usr/bin/ld: skipping incompatible /usr/X11R6/lib/libXt.so when searching for -lXt usr/bin/ld: skipping incompatible /usr/X11R6/lib/libXt.a when searching for -lXt usr/bin/ld: cannot find -lXt. collect 2: ld returned 1 exit status " The same problem I have had when I was trying to install the latest version of Root from the source: "... usr/bin/ld: skipping incompatible /usr/X11R6/lib/libXpm.so when searching for -lXpm usr/bin/ld: skipping incompatible /usr/X11R6/lib/libXpm.a when searching for -lXpm usr/bin/ld: cannot find -lXpm " For some reason the compiler ignore Xpm and Xt libraries in my computer (The same result I have, when I used the pre-build version of Xpm library from <a href="ftp://root.cern.ch/root/xpm">ftp://root.cern.ch/root/xpm</a> and when I try install the previous version of root). Finally I installed pre-build version of Root and it works. Is it a problem with the Motif library (or do I need the openMotif library?). What version (and what lib) have to be installed in my system? Does anybody have any idea how to fix it? Thank you Serg</body></html>