I am using rhino and have been modeling my project for a couple months now and have built a large amount of layers in order to organize my model. All of a sudden the layers disappeared from the layer window. nothing from the model was deleted, but I am no longer able to unlock, hide/show or do anything with the layers I have set up because I can not see them.
Below is the image showing the issue. You can see the layer tab, but no layers appear.
I have also tried restarting my computer, exiting the layer tab and reopening it, as well as trying to open other projects (even a blank project), but nothing seams to fix it.