Tom,
From a partial screenshot? Is this some sort of name-that-tune challenge? Identify the celebrity from a close-up of their nose?
As for the causes of the Audit Bad Layer message, one prominent cause is by manually placing objects on the DEFPOINTS layer, at least according to
this post.
It seems the eNotThatKindOfClass message is due to proxy objects, particularly from older versions of Land Desktop.
But this is all just a guess, and just regarding the last 6 audit errors there. Without the proxy information display, without the drawing, without the other 112,354 errors, I can't really offer anything substantial.
As for Nuke -- the first thing it does, after saving the file, is to run an Audit. In this case, it seems that strangely the file was able to be opened, but not saved. Note that when Nuke does fail, opening the file via the RECOVER command ensures that the Audit process happens first.
--J