Forums >> Revit Building >> Technical Support >> Shared parameters across different families reading from a single source

Kobbs

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Joined: Wed, May 21, 2008
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Hi all,

Maybe someone out there can help me with this, unless I'm missing something obvious it doesn't look like it's possible, which makes no sense!

I have a created a shared parameter to allow me to schedule out the site code of different elements. This is to allow someone to link multiple models together and schedule out all the furniture/equipment etc by site code.

In each Revit model the site code is always constant within the model. I.e all elements within a particular model always have the same code. What I want to do is just fill out the Site Code once have it propagate to all the families. However I can't find any way of making this happen, my only option seems to just be to set the Site Code as an instance parameter, then grab all the objects once they've been placed and input the information into them all at once. Which is a bit pants as it leaves you open to human error.

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WWHub

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I don't understand your question.  Type parameters have to be set it the type properties of each different element.  You can not expect to set different types in different families. 

And type settings can not be set from a schedule.  But instance parameters can be set through a schedule so if you sort your schedule so all elements that share this parameter are on the same line, you can set them in one place.

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Kobbs

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Yeah I think you must have got the question subconsciously, as it was the answer I was expecting to hear!

I understand the ways I can work around this problem, but it just seems rather clumsy. Every time someone does some new modelling, they will have to go to the schedule or re-select the elements and then modify the instance parameter.

Ah well, it was worth a try. Maybe in a future release we'll get some kind of 'constant' parameter that you can apply to families and will report and update the same value across all families which include it.

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Kobbs

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Yes, but in this example the type parameter would only be applicable to the family that contained it.

I would have to enter the site code into all my families. All I was hoping for was there would be some way to get the the 'site code' parameter that was in my families to read from the same source.

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Kobbs

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Okay, I tried key schedules, but that only works for project parameters, not shared parameters, which is no good as there will be times where the site code has to appear in a tag. Although good call to check it out, it is certainly something I can see myself using on future projects, so thanks for pointing it out.

I settled then, on a multi-categroy schedule, with the site code parameter set to be an instance parameter for all object categories and the schedule set up to lump all the objects together so changing the site code would change every occurance. Only to discover that a multi-category schedule does not schedule architectural system families!? So every wall, slab, roof etc that is placed within a model, would have to have the site code entered in it's own special schedule.

I spend 90% of my time these days in MEP, but you can schedule things like pipework in Multi-Category Schedules and they were system families last time I checked.

Which kind of leaves me no choice but to have a user manually select everything on a job and enter the site code every time they do some work. That, as far as I am concerned, is curse. These days I rarely find myself thinkng 'Man I wish they would put X in the next release', as the years have gone by most of the stuff I wanted has turned up eventually (hello flat oval ducts, system cable tray and conduit families in MEP2011!) Is there a reason why system families are not allowed to appear in a multi-category schedule?

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