Knsh55a Loc: MN

Don’t know if anyone else has gotten this message on their Z9. I got it when trying to use a Tamron 150-600 mm G2 lens (worked just fine on my D850). Called Nikon - they couldn’t really help me. I dug out my Tamron Tap-in console and updated the firmware (took several minutes) and it seemed to fix the problem. So if you have this combination and you’re getting an error - this should fix it.

Badgertale Loc: Albuquerque, New Mexico, USA

How IRONIC! I just got in the Tamron Tap-in console to see if it would solve this very issue. I'll let you know if it did!!!

Badgertale Loc: Albuquerque, New Mexico, USA

Yay! It worked. Seems like the older firmware caused the error.

I'm back, baby!

Knsh55a Loc: MN

I also passed this info on to Nikon in case anyone calls them for with a similar issue.

MadMikeOne Loc: So. NJ Shore - a bit west of Atlantic City

Just as a piece of additional info in case anyone else has the same problem with this camera/lens combo, I had your same issue a little over a year ago (same camera/lens combo) & found out it was caused by the then-current Z9 firmware. Once Nikon updated the firmware & I installed it in the Z9, the problem was solved without my having to do anything with the lens firmware. I think that was back when Nikon Z9 fw was still in the 2.0 version range. Then all of a sudden, just a few weeks ago, the exact same issue popped up with the same lens/camera combo. Ironically, that happened again only after I installed the 5.0 fw update on the Z9. As far as I can tell, I have the most current firmware on the Tamron 150-600 G2. The lens is going in to Tamron today for a back-focusing problem and they will be also be checking to make sure the firmware on the lens is up-to-date.
I had NO issue whatever with the same lens on my D500.