Jim provided the correct answer, but this blog took another turn.
 
I recommend that you investigate scoping, specifically Names Default to Here() and New Context when working with Include();
 
Without proper scoping, clear symbols() could lead to unwarranted behavior.  
 
You likely do not need this, but as an FYI, Run Program() can be used to create a new instance of JMP and execute a script or commands, then return to your session.  There is no sharing of data or variables.