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AE exports are blocked by a message stating it failed to create a file
Some users are being affected by blocking dialogs that state the export operation failed to create a file for one or more versions. There are a few possibilities for this happening. I'm unable to reproduce the situation here.
1. There is a permissions problem with your Aperture library.
Use Aperture's library first aid and select repair permissions.
2. There are corrupted image files in your library
Maybe Aperture first aid and repair library can help. If that doesn't resolve the situation perhaps rebuilding the library will.
3. Insufficient disk space for the export destination.
Ensure that the drive you are exporting to has sufficient free space available.
Unfortunately, it is impossible to suppress these blocking messages. They are actually generated by Aperture. I certainly would suppress them until the end of the export if I could. Sorry. :(