How to find out version

[Jochen.Reitzig@xxxxxxxxxxxxxxx]

Hello chaps,

I have a commercial product that is partly using s-lang. Obiously some native
s-lang functions are not implemented so I think that the interpreter they are
using is another version than the one whichs docu I am using.

How can I find out of what version their interpreter actually is.
 Thank you, jochen