Get line styles of background opened documents

[SpaghettiWithNodes]

Thanks Mark.

I have searched aorund the web for a solution but everything I can find is not working with background documents.

Delete Line Style Sub-Categories

HI all, I am having difficulty with this graph. Basically what I want to do is remove all of the Line Styles in the project that are not contained in a list. I have used the Categories and Get Sub-Categories, filtered the list to remove the categories i want to keep, but i cant seem to delete the ones remaining. I know that some of the remaining sub-cats are Revit defaults and cannot be removed. You will see 4 “Rubbish” line styles that i want to get rid of, which i cant. Any help is apprec…

In the screenshot below you can see the node “Get Category Properties” this one would be the perfect one for finding the line styles".

Any ideas or alternatives to make it work with background documents?

Thanks for all your help.