This happens to me twice this week, first with the white and second with the black resin. It seems like the resin is soo goeey to begin with.
I clean the tank carefully and filter the old resin from big chunks and it seems to work again on the same parts, same setting, same file.
I wonder what happened there. There were a couple incidents like this found in the search but not sure If I understand how to prevent this from happening again.
Printer is about 60% use all the time and 1 year old.
This tends to be an artifact of either under-compression or unsupported minima. Are you noticing that the prints are failing altogether or that only sections of the part are missing? If there’s just a small section cured to the tank, it’s generally safe to run the print removal tool across the PDMS and peel it up. Otherwise, following the filtering guide is a good idea to ensure that there’s no rogue resin remaining.