Try saving it to your hard drive as a .pz3 file. Reboot, open the .pz3 file and try saving it to your figures library again. Maybe you don't have enough memory at the moment and a reboot will help?

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi