Merging libraries does not work

Question

Hello,
I'm trying to import another library into my main library with File > Import > Library/Project.
I see the file dialog to choose the external library and choose the desired one.
Aperture immediately starts the import process, there is a progress bar, it takes some time, the progress bar ends, but nothing is changed, nothing is imported.
As written in the documentation there should also be a second dialog to choose whether to merge or add the contents prior the import process, but that dialog does not appear.
Any suggestions?
Thanks,
Johannes

Answer 1

Thanks! My external libraries were once exported from my main library, and I've upgraded them to the latest 3.5.1 library version.
I've tried many things:
Importing the external libraries into a new created library: works.
Importing that new library into my main library: fails.
Using all repair modes on the main or external libraries: fails.
Add an image from my main library into an external library: no effect.
Sometimes nothing at all would happen, sometimes the project from the external library has been added to my main library, but without any images, sometimes one image was imported.
I've found one workaround now:
Create 'Dummy' project in main library with a single image inside.
Export 'Dummy' as new library.
Import 'Dummy'-library into external library.
Import external library into main library.
This will force Aperture to display the add-or-merge dialog. 'Add' will now do the import, 'merge' would do the non-import as before. Apparently the automatic library 'merge' is broken.
One could think that Aperture 3 is now a mature piece of software with all bugs ironed out, but that really isn't the case. It's a grab bag of new bugs'n'crashes every day. ;-)
Happy holidays!