I am trying to create a script to modify the parameter “Show family pre-cut in plan views” which is specific to the structural framing family.
To do so, I have a dynamo script that opens a family, runs through the necessary actions and then close and saves it. This way I can update all families I need at the same time.
My issue is that I cannot find the way of modify the specific parameter, I have tried the “LookupParameter”, “Set” and “FamilyParameter” but non of them work with that specific parameter.
Any ideas?
Would help to see how you are accessing the family itself - please post your code or a graph with previews expanded and properly exported. My best guess is that this isn’t a parameter of the object you have, but if the owner family does the document you are in.
Hello @adolfomoncayo is it something here??
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Hi @sovitek thanks for the answer, it is kind of that.
Following @jacob.small request, find below a screenshot of my current script.
I am using the crumple package from the Aussie BIM Guru.
The script is meant to access a folder, get all the .rfa documents (which are all structural framing families) and then update the “Show family pre-cut in plan views” parameter to False. Finally closing and saving the families.
As shown in the screenshot, I have exploded the “FamilyDoc.SetParameterValues” node to see what is wrong, and the error is giving me is “IronPythonEvaluator.EvalueateIronPythonScript operation failed. Traceback (most recent call last): File “”, line 234, in TypeError: bool is not iterable”
@sovitek what packages are you using in your script? I can only recognise Rhythm. Also, could that same script be updated to read from a folder instead of a Revit project?.
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yeah easy 
but you could try birdtool multipalyer as well its free…, if you want to run on multiple families in folder…and then just use ootb nodes
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Thanks, I didn’t know about the birdtool multiplayer. Seems quite useful.
But I find myself still unable to get it right. I am trying the below, but can’t find a way to retrieve the “Revit.Application.FamilyDocument”. Which is odd, since the revit file is an .rfa. Any ideas??
arhh you are in family document ? then try here, depends on version. whitch version are you in
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That works, couldn’t find the FamilyDocument.ByDocument before.
I am working with Revit 2022, Dynamo Version 2.12
Now the issue is with the parameter itself I think, that or the Set Parameter node I am trying to use. As shown in the screenshot below, I am using the ootb node FamilyDocument.SetParaemterValueByName". But it does not seem to recognise the “Show family pre-cut in plan views”. I have checked the Parameters from the Family Document and cound not find it in the list (also in the screenshot). Looking at the Revit API Docs, I have found it as the member name “FAMILY_USE_PRECUT_SHAPE” but I don’t know how to modify it with a Python script.
Hello again @sovitek ,
I am trying a new angle, which is pre-loading all families in an empty Revit project and try to modify it from there. I was attempting to emulate your script but I am getting a bit lost.
I have created a python script that collects all the structural framing types loaded on the project get which family they correspond and filter it to be a list of unique items. From there I have another python script attempting to modify the “Show family pre-cut in plan views”, but it is not working. Any ideas?
I have attached the dynamo file in case it helps. I am working with Revit 2020 and Dynamo 2.3
modify.dyn (10.6 KB)
Hey @adolfomoncayo not sure these thing i mention will work in 2020…did you tried birdtool…cant remember if it support 2020 worth to check…then you could just run in family folders instead of load in and again bg open…rhythm have a node as well for open families in folder, but again not sure it will work in 2020…
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yea seems work in 2020…try that and just use, current document-family document- set family parameter in document, and then just run on all your familes in folder with birdtool…
https://www.birdtools-developers.com/dmu.html
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