Keyset fails to log keyframe

Is it possible to create an animation with the camera in orthographic mode? I’d like to make two videos of the same object, same general path, one in perspective and one in orthographic to illustrate the differences. Now when I attempt to set a keyframe i get a message saying “Keying Set failed to insert any keyframes”. I’m getting the same message in either Perspective or Orthographic modes, however, but I can’t think of what would be preventing a keyframe set.

Thanks again.

Version 2.56

got it. my bad, I found the thread with the same title.