Personally, my RAW (I shoot .NEF as well) has always worked that way. Once the RAW dialog box is open, it has never allowed me to add another RAW file until I have completed what I want to do on the original that's been opened, and have subsequently closed the RAW dialog box. However, when selecting multiples and opening them simultaneously, they all show up on the left side of RAW and are editable individually, or by making a change and then synchronizing my changes to everything currently in that dialog box.
I know only one .RAW will pop up in Camera Raw at a time to be able to adjusted. However, even if I have completed my adjustments, completed whatever I need to in Photoshop, and then saved my file, it will not allow me to open another file through Camera Raw. I just get the dreaded error message.
OH! You mean you've saved and closed the dialog box and this happens? Sorry for misunderstanding!
So - can you please describe, step by step how you're attempting to open that file "through" Camera Raw? There's something I'm missing on this. For me, even when I Save Image... I am left with Open Image (which opens the image into Photoshop), Cancel (which closes the dialog box), or Done (which closes the dialog box). I don't know of a way to open another image directly into Camera Raw when using it from within Photoshop.
I guess I'm trying to clarify if the RAW dialog box is still open when you're attempting this, or if the whole dialog box is closed, and won't REopen when you try to open your .NEF.
Sorry I'm confused, but there's a part of the question I'm missing, but I want to help...
Not sure if you can help. But I've just taken out subscription to the Photograpy modules and Camera RAW will only open one file at a time. In CS6 I used to get a list of raw images on left hand side but now they just appear one at a time. Edit one, open in PSCC and then it pops up the next in RAW. WHY IS IT DOING THIS>