[GRASSLIST:2160] nviz not working on rh6.0 with grass5.0pre

[managing trustee]

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dear all

i'm using grass5.0pre (downloaded binaries) for linux (redhat6.0).

i'm having a problem using nviz. the message that appears is:

/opt/grass5/etc/nviz2.2/NVWISH2.2: error while loading shared libraries: libtk8.3.so.1: cannot open shared object file: No such file or directory
child process exited abnormally while executing
"exec /opt/grass5/etc/nviz2.2/NVWISH2.2 -f /opt/grass5/etc/nviz2.2/NVWISH2.2/scripts/nviz2.2_script el=<rasterfile> -name NVIZ >&@stdout
        ("eval" body line 1)
        invoked from within 
"if {$arg == ""} {
#no arguments
eval exec $env{GISBASE}/etc/nviz2.2/NVWISH2.2 -f $env(GISBASE)/etc/nviz2.2/scripts/nviz2.2_script -name NVIZ >&@stdo..."
        (file "/opt/grass5/bin/nviz" line 13)
can anyone please help?

thanks in advance.

sujoy chaudhuri
gis analyst
ecollage
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