Hi all,
Just a heads up: if you are using Limnono's tool or Gregs 2k16 explorer and corrupt your rosters, or corrupt it in another way, verifying your game cache should fix it 100% of the time.
I ran into a situation where players on the euro teams just disappeared, they literally didn't exist anymore. They still had the correct CF ID assigned, but that ID wasn't working anymore. It was that way on any roster I had or tried to create from scratch. Verifying the game cache made them all appear again, and I didn't lose any of my rosters or progress in said rosters. Verifying the game cache seems to only remove things like JUKEBOX music that you have imported using Gregs explorer tool (or anything else you have imported using his tool)
Hopefully this helps someone out