We have a stream channel alignment/profile cross section drawing with 50+ section views. Some section views were created as part of 8 separate section view groups while some were created individually. The drawing is apparently corrupted; many of the section views that belong to groups have moved on their own, perhaps back to the XY coordinates at which they were originally located. The individual section views are still in their original locations.
Has anyone seen this problem? The drawing was created in C3D 2009 but we've since upgraded to 2011.