See image for description from Work Environment setup.
Barry.
One of the forum moderators. Versions 6.5 to 27 i7-10700 @ 2.9Ghz, 32GB ram, GeForce RTX 2060 (6GB), Windows 10 Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11
Once or twice when opening an older file, I've had the Library Manager report a surface bitmap as a missing attribute, but that bitmap was no longer being used in any of the current Surfaces. This usually means Cinerender is still looking for an older bitmap. In the past these ghost attributes were nearly impossible to track down. Check Surfaces searches for "parameters of unused rendering engine(s)" and offers to delete them for you.
David Collins
Win10 64bit Intel i7 6700 3.40 Ghz, 32 Gb RAM, GeForce RTX 3070 AC 27.0 (4001 INT FULL)