Some users encounter blocking dialogs during export operations that report the system cannot create a file for one or more versions. The developers note they cannot reproduce this issue consistently.
Potential Causes and Solutions
Permissions Issue
The Aperture library may have permission problems. Users should run Aperture's library first aid tool and select the repair permissions option.
Corrupted Image Files
Corrupted files within the library could trigger this error. Running Aperture's first aid and repair library function may help resolve it. If unsuccessful, rebuilding the library entirely may be necessary.
Insufficient Disk Space
The export destination drive may lack adequate free space. Verify the target drive has sufficient capacity before attempting export.
Additional Notes
These blocking messages are actually generated by Aperture and cannot be suppressed by Aperture Exporter, though ideally they would be deferred until export completion.