ry@node72:~/nl/vnl/lib$ Traceback (most recent call last):
File "<string>", line 1, in <module>
File "./zipdir/NL/GUI/Main/Main.py", line 21, in main
File "./zipdir/NL/GUI/Main/SplashScreen.py", line 46, in loadModules
File "./zipdir/NL/GUI/Tools/Viewer/Viewer.py", line 13, in <module>
File "./zipdir/NL/GUI/Graphics/GL/GLPlotManager.py", line 21, in <module>
File "./zipdir/NL/GUI/Graphics/GL/GLContourBox.py", line 10, in <module>
File "./zipdir/NL/GUI/Graphics/GL/GLContour.py", line 20, in <module>
File "./build/vnl/lib/python2.6/ctypes/__init__.py", line 431, in LoadLibrary
File "./build/vnl/lib/python2.6/ctypes/__init__.py", line 353, in __init__
OSError: libGL.so: cannot open shared object file: No such file or directory
how to solve it?