I've searched the forums and seen many people in the past have the issue of "Rebuilding Index" appear and cycle for infinity, but haven't found a solution for myself.
For the first time in my project I'm trying to create an sprite animation using a sprite sheet.
When I create a new SpriteAnimation, Open Editor, and choose "Create -> New clip", the Rebuilding Index message appears and continues forever. Unity displays the error "Unable to find sprite collection. This is a serious problem." I just updated 2DToolkit to the latest version today, but it did not help. Also I do use SVN, if that makes a difference.
Any help would be appreciated.