Aperture erro - ICA download error -45

Question

Anybody know what this error might mean Apple has never heard of it, Google has never heard of it - do I get a prize for being the first to ever have it?
it occurs when I try to import pictures to Aperture.

Answer 1

A little more digging reveals that ICA is Apple's Image Capture Architecture - what Image Capture and other apps use for working with images.
I poked around the header files in the ICA framework, but there's no -45 errors. There is a -45 error that's just a standard Mac error: it's a "file is locked" error. Perhaps you have a file inside the Aperture library that became inadvertently locked, and now you can't import anymore.
Have you had Aperture crash recently, during an import perhaps? I'm not sure if rebuilding the library would help or not, but it seems like the root of your problem is a locked file that Aperture write access to before it can do another import. It could also be an ICA thing, where similarly it's trying to write to a file that's locked. Unfortunately, I don't have the knowledge to say which it is, or what this file might be.
I suppose as a last suggestion, maybe launch Console (in /Applications/Utilities), and watch your console.log while you try to do an import. Maybe either Aperture or ICA is writing an error to the console that is more helpful than what Aperture shows you.