An error occurred while drawing the world T{ world f ~array~ ~array~ f f ~vector~ ~array~ ~debugger~ t t f.... This world has been deactivated to prevent cascading errors. Required OpenGL version 1.0 not supported ((null) available) If you have several libGL.so installed, Factor tried the first one in: ldconfig -p | grep libGL.so$ You can change the library used like so: LD_LIBRARY_PATH=/usr/lib/fglrx ./factor