Cannot open 'PDF portfolio'

Solution 1:

My solution is based on this answer which suggests a few different PDF applications:

I found that not all these programs actually work for this. In my case pdftk did not work and okular did. One down side with Okular is that you have to export the PDFs contained in a portfolio into individual files:

1. Open with Okular

2. Click first item then ctrl+a to select all

3. You'll be prompted to select a file name and location. You can just keep hitting enter.

It's not as good an experience as using Adobe but it gets the job done.

Solution 2:

Try evince, the GNOME document viewer

Hit F9 to make the sidebar on the left visible, then at the top of the Sidebar there is the "Thumbnails" menu. Click it.

Then you'll see this:

• I guess, by default "Thumbnails" is selected.

Then you can change to "Attachments".

This will make the Embedded PDFs visible (see below). You can click on any red PDF icons in the sidebar individually. It will open in a new pdf Window. You can also multi-select (click topmost icon, hold shift, click lowermost icon) the icons and then save them all at once, into individual files.