Pioneer BD-RW BDR-212V --could not perform end-of-disk at once.

[tkmops]

Pioneer BD-RW BDR-212V --could not perform end-of-disk at once.
Win 10, current updates.
I've recently been getting 'could not perform end-of-disk at once on my Pioneer BD-RW BDR-212V(only 2 years old). According to the Microsoft site, it could be bad media(doubtful--tried 8 brand new BD-R disks), or my drive needs a firmware update.
The burner was working fine up until a week ago, then started getting that error. Win10 wanted a update, so I did that, hoping that would fix the issue. No, still getting that error. This has happened in the past, and has always corrected itself, either by itself, or after a Win update.
I searched various sites for the Pioneer BD-RW BDR-212V firmware update, but can't seem to find it. When I tried to update the drive via Control Panel, it came back 'you already have the best driver'.
Anyone have a link for the driver/firmware update?
Hmmmmm....any ideas, anyone?
Thanks!