Colliding Expression?

[Christopher]

Can you prevent a linked expression from colliding with another object ? I have a linked expression on a object but it collides with the other object, when it goes to far, the object with the expression is the slave (child of a parent), can a condition statement accomplish this and if so how would it be written ?

Current Expression;
l_fcv( this.kine.local.posz )

[Christopher]

I gave a condition expression a whirl, expressions is good for constant motion, not sure if I can feed in a static object kinematics to a expression condition, maybe can't be done, unless I do this in ICE.

::Christopher