Hi, Many thanks to all, to show me the right way to solve my problem. I changed all LC_xxx to C in / etc / TIMEZONE. Reboot the system make all my program. my PROBLEM SOLVED! Bey the way, the X11 problem in Solaris 10 is known and well described. But I could not find an update for it. CVE-213-1997. But I would like to have a solution. Thank you ALL! Rolf Perau