Provide users with a warning that equations exist in the design that reference deleted parameters

[hopeFST6F]

This issue is described in this forum: https://forums.autodesk.com/t5/inventor-forum/deleted-dimensions-stay-as-parameters/td-p/13720916

Summary: As we know, you can easily create a parameter or dimension that references another existing dimension (e.g. "d1 = 2*d0"). This feature is super useful for parametric designs. If at some point in the future I decide to delete dimension "d0", then "d1" continues to be computed using some previous cached version of dimension "d0". The issue here is that there is no warning given to the user that the design now contains a broken reference.

Fusion 360 handles this relatively gracefully (see below)

Suggested feature: pop-up window warning like in Fusion 360, and/or exclamation mark beside features/sketches in the feature tree that reference the deleted parameter 

[WCrihfield]

Interesting situation and very practical & reasonable request.  I had not really paid much attention to that little detail before, but will from now on.  It would definitely be nice if there was some sort of indicator or warning about when that happens.  At least they do provide an indicator that the sketch dimension is being driven by an 'equation' with the little 'Fx' symbol next to it when appropriate.  Now that system just needs to evolve another step to deal with this important situation.  I mean, they do now have an entire product named 'Informed Design', which is what we are asking for here...to stay 100% informed about our designs.