The "Nested Links Invisible" message means that there is a link within the file that you're linked in. As stated in the previous post, determine if there are any elements in your project, the best method is to use View Tab » 3D View ▼ Default 3D View. And if you are seeing nothing in you project, you may be inserting a linked Revit Project that contains nothing but a linked Revit Project in it.
Corey D. ────────────────────────────────────────────────────────────────────── ⁞|⁞ Please use .Accept as Solution and Give Kudos as appropriate to further enhance these forums. Thank you!