Navisworks API

Distinguished Contributor
Posts: 748
Registered: ‎12-12-2003
Message 1 of 2 (133 Views)


133 Views, 1 Replies
01-18-2013 10:00 AM

I have a selected modelitem and i'm trying to get the model that it is in and add it to a modelitemcollection.


foreach (ModelItem item in selectedItems)

 I am getting the error "Object reference not set to instance of object". How can I acomplish this? Thanks.

Active Contributor
Posts: 45
Registered: ‎11-14-2012
Message 2 of 2 (125 Views)

Re: item.Parent.Model.RootItem

01-20-2013 02:20 PM in reply to: bthatcher



Have you tried using the AppInfo tool from Navisworks sample code? this wouls help you find out what is thowing the error. So far I have 2 guesses:


First, is your collection initialized? (new collection)


Second, only the RootItem has a value for the Model property: RootItem.Model; so if your item is a 1st level child of the RootItem, then you can access this property with Item.Parent.Model; but if your item is a N-th level children then you need to call the parent method N-times: Item.Parent.Parent.Parent.....Model.

You may need a recursive method.

Post to the Community

Have questions about Autodesk products? Ask the community.

New Post
Need installation help?

Start with some of our most frequented solutions or visit the Installation and Licensing Forum to get help installing your software.