I love the Aperture plug-in’s from Nik Software, especially HDR Efex Pro, which I’ve been using a lot. To edit a picture in one of the Nik plug-ins, right-click on the picture, select Edit with Plug-in and make your choice (if you have more than one plug-in installed). Then the plug-in, such as HDR Efex Pro loads, I make my edits and upon exit of the plug-in, the edited image gets saved back into Aperture, without overwriting the original image.
Lately I’ve noticed that HDR Efex Pro produced the following error message when loading an image out of Aperture:
Aperture cannot import the edited image into the original folder. If you continue, you will need to import the saved image manually. Do you want to proceed?
As a result, I had to save the edited image to my hard drive and then import it back into Aperture. That was a major pain in the a$%, as you can imagine.
I called Nik Software’s support hotline and the friendly support agent on the other end told me, that the issue is known and probably caused by an incompatibility of HDR Efex Pro and one of the recent Aperture updates. He also said, that the issue should only occur when editing an image out of an Album. Editing an image directly out of a Project should work. I gave it a shot and indeed, it worked! I was a happy camper again but decided to write this article, if someone else is experiencing the same issue. Especially since I could not find any useful information when googling for this issue.
Initially I wanted to post a nice screenshot of the error message but guess what? The problem doesn’t occur anymore 
I have no idea what changed, other than me opening an image out of a project with HDR Efex Pro.
Either way, thanks to Nik Software for their great customer support! Also Nik just announced HDR Efex Pro 2, so if you don’t have the plug-in yet, I’d recommend getting the new version!
PS: The Amazon page shows the wrong image for the product, not sure why
