I haven't seen the 'viewing: on any standalone device' before.
One thing to try is to sidestep ADE, and to copy the DRM .epub file from PC to Nook using Windows Explorer or similar.
The book info in ADE will tell you where the file is on the PC.
Probably should go to the 'Digital Editions' folder on the Nook, but should be fairly easy to see where the .epub files go there. (***)
That copying will almost certainly work regardless of the 'viewing: on any standalone device' detail.
It may or may not be that the Nook will then be willing to show it once it is there.
(***) p.s. Just noticed that you can find where books are placed on the Nook from book info in ADE as well.
Just look at your Nook library from within ADE and look at the info.
At least, that will work for books that made it to the Nook; so tell you the right directory there.
This worked. Just copied the book to the Nook Digital Editions folder and the Nook found it and it looks readable and all.
Thanks very much for the help...and for making me look not so smart.
But I am still curious about why it happened in the first place AND why the direct copy method worked. I thought you used ADE to handle DRM epub files and without it you could not get them to the Nook.
The process of getting a DRM .epub file is (1) to download the .acsm file which is a sort of reference to the real data file, and (2) to use the .acsm file to download a DRM .epub file.
Step 2 looks at the currently registered Adobe ID, and downloads a .epub file that is encrypted so that it can only be read on devices with that ID. Step (2) is often driven by ADE, but can be done by various other software; for example the Bluefire tablet app can do it.. The important thing is the result: a DRM .epub file encrypted for use with the AdobeID.
Once you have that file, it should be able to be read on any device registered with the ID.
When you use ADE to register the device, it copies the AdobeID registered to ADE as the AdobeID for the device.
Thanks for the explanation...I am smart enough to understand it and it gives me help in future troubleshooting and options.