RFA Void Constraint help!!!!!!

[Jes_Gonzalez]

Hello, I'm creating a family and wanted to see is it possible to add constraints to a void? The main object extrusion  has Length, Width, and Height parameter but when I adjust the Height param where the void is at it throw an error. Any help will be appreciated. Thank you 🙂

[RDAOU]

@Jes_Gonzalez 

Yes you can constrain void extrusions either using parameter, locked measurement strings or by locking to reference planes

What error / prompt message are you getting?

[Jes_Gonzalez]

I'm getting Constraints are not satisfied. Let me see if i can upload the rfa.

[Jes_Gonzalez]

Here it is, when i adjust the height param is when it goes wonky. 

[RDAOU]

@Jes_Gonzalez 

I can't remodel it at the moment but I see that the void and eventually all the arrayed elements are not locked/constrained to anything

1. Delete that array and leave the original void.
2. Drag the lower Shape handles (the blue arrows) and lock to the bottom reference plane
3. Place another reference plane and set a locked measurement string as shown
4. Drag the upper shape handle and lock with the top reference plane you added in step 3
5. Redo the array
6. Lock the last element of the array to the reference planes on the other end

[Jes_Gonzalez]

Let me give it a shot.

[Jes_Gonzalez]

I followed your steps and ran into the same issue. I even tried it on one void to make sure. 

[barthbradley]

My suggestion would be to Name the very bottom Ref. Plane and make it the Voids' zero start origin (a.k.a. "Extrusion Start") and then control the void height via its "Extrusion End".  You can associate the Voids' "Extrusion End" parameter to a Host Parameter in the Family Types dialog box.

 

[barthbradley]

---

@Jes_Gonzalez wrote:

I followed your steps and ran into the same issue. I even tried it on one void to make sure. 

---

This is a pretty common error with Arrays.  It has nothing to do with the Void.  

[RDAOU · Accepted solution]

@Jes_Gonzalez 

When you are arraying in family editor (void or solid forms) best is to nest them...when you array a void in a family, first thing Revit 2020 prompts you to do (the below)….the reason is because when you nest the family you are able to constrain it more efficiently at the beginning and the end of the array (First and Last element of the group)

Apart from the void,

• You have constraint issues with the extruded profiles too.
• I also believe that a swept profile would give you better result

To sum all up, when you manage to fix something in this family another thing breaks...I recommend you rebuild it using nested families

As much as people had headaches from arrays ... Autodesk was so kind to give them a prompt 

[Jes_Gonzalez]

I nested everything and it works like a charm. Thank you!

[gsovaite]

Came across this post looking for solution, but found it myself while modelling - watch for what is aligned when selecting geometry from the nested family - it has to be reference plane, not the shape reference.