I've had this same problem with Avid MC6 and AE CC 2012. Do this in the following order, checking if the step fixes the problem:
- Restart your machine.
- Create a new AE project, using it to purge all your caches.
- Trash your AE preferences.
I had to finally trash preferences. Ugh -- you have to rebuild them all. Fortunately, I had a good copy of preferences squirreled away elsewhere.
Thanks. I already tried what you are suggesting Dave, didnt work for me, the problem was something else.
I finally found the answer some days ago on a other forum.
I had to go to Preferences> Media & Disk Cache> uncheck " Write XMP IDs files...." and "Create Layer Markers...." and then instead of using Pro Import to import the AAF just dragging it into AE and everything worked as a charm.
I heard that its better to drag the AAF directly into AE.