Do you mean the driver's command queue for driving to and navigate to?
There are a couple of causes:
1) This is a new session, not the original session associated with the original route, so nothing's there and you need to recreate the session again.
2) You brought in the session, but there's a gazillion drive to locations.
If there are a lot of destinations, then there's a possibility the stations won't show up. You may need to use Driver To EX and related Navigate to EX. What these do is expand the list to more than 20 lines which is the limit in the driver command list. P-Denhert has the link for that, or posted it anyway. If you can't find it, I can PM you a link to the files since they're freeware and he had posted the link originally.