Finding elements which have no host

Revit
1

Hi,

I have searched these forums and the internet but was not able to find an answer to this simple question: -

I am trying to use dynamo to tell me which family element does not have a host. I want to then be able to select the element from within dynamo and re-host it within revit. So i want Dynamo to give me a list, i will manually evaluate whether the element should be hosted to something.

Dynamo%20Host%20graph
Dynamo Host graph.PNG1908×670 169 KB

The image shows my current graph whereby i have to manually scroll up and down to match the elemtn id with the “null” host node…!

thanks

2

Hi,

You can do it with a AllIndicesOf and then sort them out by that :slight_smile:

3

filter by boolean mask splitting into two lists, make your mask with the contains node, then use the indexof to get the nulls related objects

1 Like
4

would you be ableto guide me further? i’m having trouble doing what you have suggested

5

image
image.png2706×1267 827 KB

dont look at the first part of the graph, it is just to make me a list with mixed items

1 Like