[Scilab-Dev] Modifying permanent variables for Scicos

[Enrico Segre]

>  but every temptative to
> modify the "%scicos_menu" and the "scicos_pal" variable gives the same
> error
>
>  Redefining permanent variable.
>
> How can I change the two variables? 
>   
lower predef() before modifying and restore it afterwards.