With `exec("....sip-0.8.0-git/loader") in your scilab.ini startup file,
start scilab at a command terminal with "scilab -nogui".
Things are now very broken.
Here's a sample session:
Consortium Scilab (DIGITEO)
Copyright (c) 1989-2011 (INRIA)
Copyright (c) 1989-2007 (ENPC)
loading initial environment
Type "help assert_overview" for quick start.
Type "demo_gui()" and search for Assert for Demonstrations.
Warning: recursion problem..., cleared.
-->a+3 //should print 3 but doesn't.
-->%pi //should print pi but doesn't.
No matter what you type at the prompt, hitting enter just gives another prompt.