In Content Manager, list the dependencies for your route.
Sort on the Status column to group all the missing dependencies together. If you don't have that column showing, you can add it by right-clicking anywhere on the columns and the choosing add. Sort and resize the position by dragging and widening like in Excel.
Once the assets are sorted by status and the missing ones are at the top, highlight the missing dependencies listed in 22PE.
Right click on the selected assets and choose View in new window.
A new Content Manager screen will open up.
At the top of the Content Manager screen is a bar prefixed by asset Kuid.
Highlight the assets in that bar and press CTRL+C
Open up T: ANE.
Go into Content Manager.
Click on the small arrow pointing to Install to expand the filter.
Click on the + sign on the right.
A new filter item will appear. Change that to Asset KUID if you have to.
Click in that open space and press CTRL+V to paste the list of KUIDs you copied previously.
This will list those assets you missed when you copied over.