1.why don't you make a vrScilab for Scilab2.7 linux editon?
In fact,we are puzzled at this problem,it seems that the tcl interpreter in the edition don't support the "cascade menu" and "package"very well,And there's no time for us to write a new script,So
we finally give that up.

2.why do you only support the "freewrl" in the "preview" function under linux.
Well,we paid a lot of time in searching a "vrml viewer" on the internet to only find that there are so many different kinds of tools for Linux, And each tools must specifically installed only on special version of linux.Finally,we dicided to choose the famous "freewrl".
We feel sorry if you don't have a "freewrl", you can get it from our installation package. You can also change the "envi.tcl" to make it work for you.

3.my Linux is not redhat(or using Unix) ,can i get special version for unix?
First, we don't have a Unix platform for us to test the program.
Second, we don't have time too. :)
But maybe you can also try the Linux version. It supposed to work well too.

4.What kind of Scilab script can be convert to corresponding VRML file with VRScilab ?
Please try your script in Scilab. If any 3d-graphics is plotted and all plot function is in the list of VRScilab ,it will be done.( see Function Reference for more details)

5.Why there's a syntax error when running plot demo like "plot3d()" in VrScilab?
When you run "plot3d()" in Scilab,in reality,it's running the scirpt:"t=%pi:0.3:%pi;plot3d(t,t,sin(t)'*cos(t),35,45,'X@Y@Z',[2,2,4]);",but our VrScilab simply convert it to vplot3d with no parameters,it unevidentaly cause the trouble.
In a word,we don't support the demo of plot function being converted to VRML files.So try to use the "real" script in it.