There is a bug in Aperture related to switching libraries that affects the APIs used by Aperture Exporter (AE). If you use Aperture's fast library switching feature (accessible via File → Switch to Library) and then use AE, you may encounter unexpected results.
The Problem
Data retrieved using Aperture APIs become stale and/or corrupted after the fast library switch. The safest approach is to shut down Aperture completely and restart it with the desired library rather than using the fast switching feature.
Symptoms
One common manifestation occurs when AE creates target folders but no images appear in any of them.
Solution
If you suspect you've been affected by this bug, follow these steps:
- Shut down Aperture Exporter
- Shut down Aperture
- Restart Aperture with your desired library
- Try using AE again