Hi
I am trying to bulk change every wall i am filtering in my project to another material - it works, but only the first wall type changes.
not sure what im missing
i will try again tomorrow, but any help would be much appreciated 
It is highly unlikely that you’ll get any help here with the screenshot you provided - it is not legible.
That said, it looks like you might need to change the lacing settings of the node that assigns the material to longest.
cheers, will give it a go.
I will reupload the screenshot - this was the pic taken using dynamos built in option.
That’s a quirk of the screenshot tool.
If you zoom in closer and then take the screenshot the node titles and labels should be included.