To run GRASS 5.0.0pre1 on Suse6.4 Linux, you have to update the tcl/tk libraries (libtk8.3.so, libtcl8.3.so) and postgresql library (libpq.so) How to update tcl/tk libraries to tcl/tk8.3: Get from SuSE Linux V 7.0 ftp://ftp.gwdg.de/pub/linux/suse/7.0/i386.de/suse/tcl1/ tcl.rpm tk.rpm (eventually tix.rpm, not needed for GRASS) How to update postgresql library: ftp://ftp.gwdg.de/pub/linux/suse/7.0/i386.de/suse/ap1/ pg_lib.rpm Use "yast" to replace/install the above libraries. Then NVIZ should work properly. GRASS Development Team, based on hints from Marcus Schade. 5/2001