Dynamic block parameter expression issue

[Anonymous]

Hi there,

I am looking to create an expression/formula for all constraints shown in attached screenshot: d2 - d9. Ideally, I would like to type something along the lines of '=Diameter/8' for each dimension. 'Diameter' is an action parameter and for some reason I can't refer to it in an expression. Would anybody be able to assist?

Many thanks,

James

[Libbya]

You cannot reference dynamic parameters within the expressions of parametric constraints.  That's just the way it is.  The dynamic parameters/actions really don't play well with constraints and aren't meant to.  Pic one or the other.  Judging from the screenshot it would be fairly easy to make your block with either and my choice would be the dynamic parameters/actions as they function more reliably.