"The project contained a sequence that could not be opened..."
"...no sequence preview preset file or codec could be associated with this sequence type."
I updated recently to Premiere CC 2015.3. This morning, opening a project which I'd been working on all yesterday in Premiere, I got the above error. I can't open this project in earlier versions of AP, natch.
I created a new blank project (no. 2), tried to import the entire problem project into it, and got the same error. I then tried to import only the latest sequence into this new project; which worked fine.
However, when I save project no. 2 (with its one sequence), and try to reload it, I get the same error as above. The only solution is to create another blank project (no. 3), import the (single) sequence from project no.2 into it, and then I can work with this. Which is odd, because importing the whole of project 2 doesn't work; only the single sequence it contains - which comes to basically the same thing.
I also can't export via AME (to H.264; I haven't so far tried any other codecs). I have to export directly from Premiere.
I have uninstalled and reinstalled Premiere, with exactly the same results. I also get exactly the same problem on two other machines here.
Machine specifications:
#1: Windows 10 laptop, Adobe CC2013.3, 32GB RAM, twin SSDs, nVidia Quadro 5010M
#2: Windows 10 desktop, Adobe CC2015.3, 32GB RAM, SSD boot / spinning swap drive, nVidia GeForce GTX 770
#3: Windows 10 desktop, Adobe CC2015.3, 64GB RAM, SSD boot / spinning swap drive, nVidia Quadro K5000
