Forums >> Revit Building >> Technical Support >> Sketch/Family Constraints

jsego

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Joined: Tue, Feb 3, 2009
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Hello,

I am using Revit 2014.  I have created a parametric louver family, but am running into one last issue.  The louver's width and length can be controlled, and also the quantity of fins within the louver.  However, I am trying to get the length of the fins to change with the length of the louver.  For the fins, I have a parameter set up that is called 'Fin Length" that subtracts 4" from the overall length (for the 2" frame on both sides).  The fins are created by a sweep and whenever I try to lock the ends of the sweep's path to these reference planes, I get the error below and it won't lock.  

You may not create sketch or family constraints between group members and elements which are not members of the same group.

Do I need to make a separate family for the fins?  Any ideas?

Thank you!

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dgcad

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Joined: Thu, Mar 17, 2005
1231 Posts

I'd say yes, Nest the fin family. 

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jsego

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Joined: Tue, Feb 3, 2009
7 Posts
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Thanks for the reply.  I still cannot get the length of the fin to stretch/skrink with the length of the overallparameter. 

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