libOpenGl.so on Linux

I'm trying to run ShapeViewer and Samples on Mandrake 7.1 with the whole package .CAS4.0DVP1 and Mesa 3.0 The installation went well, but when I launch setup.csh I get this:

[cascade@localhost ~/ShapeViewer]$ Warning: Cannot convert string "Home,_Ke y_Begin" to type VirtualBinding Warning: Cannot convert string "F1,_Key_Help" to type VirtualBinding Warning: Cannot convert string "ShiftF10,_Key_Menu" to type VirtualBinding Warning: Cannot convert string "F10,Shift_Key_Menu" to type VirtualBinding Warning: Cannot convert string "KP_Enter,_Key_Execute" to type VirtualBindi ng Warning: Cannot convert string "AltReturn,Alt_Key_KP_Enter" to type Virtual Binding 0x44f63700 : Aspect_GraphicDeviceDefinitionError: /home/cascade//CAS4.0DVP1/Linux /lib/libOpenGl.so: cannot open shared object file: No such file or directory.

Actually libOpenGl.so doesn't exist neither on the system ( with find / -name libOpenGl.so -print ) nor under CAS4.0DVP1/Linux/lib. I tried to cheat by replacing the missing file with libGl.so but no wonder that doesn't work. I noticed that this lib was included in the SUNOS CASCADE distribution. So I think It would be normally included in the Linux one. Therefore I tried to find if it was built during the compilation then checked the *.comp files : no result..

I think my env. is OK ; there is a part of it:

HOME=/home/cascade TERM=xterm PATH=/usr/local/bin:/bin:/usr/bin:.:/usr/X11R6/bin:/home/cascade/bin:/usr/X11R6/bin:/usr/games:/usr/local/gcc-2.95.2/bin: /usr/jdk1.2.2/jre/bin:/home/cascade/ShapeViewer/OL

SECURE_LEVEL=3 RPM_INSTALL_LANG=fr_FR:fr LC_MONETARY=fr_FR LC_COLLATE=fr_FR _=/bin/csh OLDPWD=/home/cascade VENDOR=intel GROUP=caduser HOST=localhost.localdomain CASROOT=/home/cascade/CAS4.0DVP1 LD_LIBRARY_PATH=/home/cascade/CAS4.0DVP1/Linux/lib:/home/cascade/ShapeViewer/OL:/usr/X11R6/lib:/usr/Mesa-3.0/lib . I also searched it on the web ; uselessly. One more thing : I downloaded the package , there is only setup.class into it ( no usual setup.csh ) so I installed it through the command line. Now I don't know what else to do. If anyone has any clue, thanks in advance.

M. KALAI