Change Host Family parameter by referencing Nested Family Parameter

[cole.went]

Hello!

I’m working on a Dynamo script that will reference a parameter in a Revit family, and based on that field, fill a different parameter with information referenced from an Excel file.

I’ve referenced the threads listed below to get close to what I’m after:

Excel to Revit Families sorted via Excel Value

Hi All, I am a noob to Dynamo but the script I would like to put together involves retrieving a parameter value(P&ID Number) from an element and then fill that element with values assigned to that P&ID number in the excel row. Can anybody offer me some guidance on this? Currently I know how to retrieve data from Excel and fill families of a certain type with data but I want to fill them by their P&ID Numbers. I’d greatly appreciate any help, thanks. E

Automatic tags from excel

I could not get the Dictionary to work. Was able to use the Dynamo in the Excel to Revit Families sorted via Excel Value thread The entire script is working correctly and I see the outputs giving the desired values [5] But for some reason, the information is not being inputted into the Room Element Room “SB103” should have the information: B1_SS2_R009 test room 2 HSFP=3m [5%20output] EDIT UPDATE seems like the code is working but only for one entry (labeled in red) the node ByParame…

SetParameterByName for multiple elements in a list

Dear fellow Dynamo developers I feel like I am pretty close to getting the Dynamo script that we need. There is only one last node that does not seem to do what I expect it to do. I am not entirely sure if the problem is it being the wrong not, or that I might have gotten something mixed up that resulted in the incomplete output. Another set of eyes and minds might be all I need here. Maybe there is something obvious that I failed to spot. Would appreciated greatly any opinions and ideas! Goa…

Here is a snippet of what I have currently:

The problem I am running into is that the parameter that I am referencing in the family is an instance parameter of a nested family pulled into the host family. When I try writing the data from excel back into the family it references the nested family instead of the host family and the nested family parameter where the excel information would be written to is not editable. What I would like to happen is for the excel information to be written to the host family parameter. I can’t figure out how to reference the nested family parameter, but then write to the host family parameter.

I am newer to Dynamo so I may be going about this all wrong. Any help would be greatly appreciated! My file is also linked below:
Pre-InstallsT3.dyn (74.2 KB)

[cole.went]

Here is a link to my Revit Model with the Equipment families for reference:

Dynamo Test Project.rvt

[cole.went]

@walraven.timo Would you be willing to take a look at this? Your help on the above thread was the basis of my script. Any help would be greatly appreciated!

[walraven.timo]

I’m sorry, but I haven’t used Dynamo/Revit in almost 3 years and don’t remember the in’s and out’s of this script. From reading your text, I would advise you to look at the way your family is set up to make it Dynamo compatible. Hope you can figure it out yourself, cheerio!