5.1.1 on CentOS 5.4 x86_64: can not run demos

[Vnpenguin]

Hi,
I just downloaded version 5.1.1 Scilab (binary for Linux 64bit). My
system is CentOS 5.4 x86_64.
I run Scilab by command:

/opt/scilab-5.1.1/bin/scilab

Scilab starts ok. But when I click on "Scilab Demonstrations" =>
Graphics => "2D and 3D plots" I see many errors in console:

================= Begin error messages ========================================
Startup execution:
  loading initial environment
 Warning: file '/opt/scilab-5.1.1/share/scilab/modules/graphics/demos/graphics.dem.gateway.sce'
already opened in Scilab.
Warning: file '/opt/scilab-5.1.1/share/scilab/modules/graphics/demos/graphics.dem.gateway.sce'
already opened in Scilab.
 !--error 241
File "/opt/scilab-5.1.1/share/scilab/modules/graphics/demos//opt/scilab-5.1.1/share/scilab/modules/graphics/demos/2d_3d_plots/2d_3d_plots.dem.gateway.sce"
does not exist or read access denied.

at line      38 of function demo_gui_update called by :
t(18);script_path = demo_gui_update();exec(script_path,-1);;if exists("%old
while executing a callback


 !--error 241
File "/opt/scilab-5.1.1/share/scilab/modules/graphics/demos//opt/scilab-5.1.1/share/scilab/modules/graphics/demos/2d_3d_plots/2d_3d_plots.dem.gateway.sce"
does not exist or read access denied.

at line      38 of function demo_gui_update called by :
t(18);script_path = demo_gui_update();exec(script_path,-1);;if exists("%old
while executing a callback
=========================== end of error messages
=================================

Anyone could help me to fix this please.

Thanks in advance,

-- 
http://vnoss.org