"Bytes not ready" error

Same error message. After considering and/or trying many of the suggestions, the one that fixed it for me was syncing.

I use Dropbox and it's very aggressive about offloading local files to the cloud. It was doing that with my PDFs almost right after creating them. When I manually forced them to reside locally, the errors all went away.

Longterm solution is maybe dial down your cloud settings so it keeps active files local. Or get in the habit of checking the PDF before opening it — in Mac Finder I have a small cloud icon beside the file. I just click the cloud (to download) before double-clicking the file to open.

Arg! This happened out of nowhere! 
My problem: adding a 1 page PDF agenda to a 20 page packet. I had the larger file open first then tried to add the 1 file to the front and got BYTES ERROR.

My solution: open the 1 page agenda first then add the 20 pages under Organize Pages.  

The file might be in the cloud. It won't import until you download to the local drive. 

Just had this problem today on my MacBook Air using Adobe Acrobat Pro.  I was trying to combine files (add another pdf as a second page to my current pdf).  I finally figured out that the pdfs were not recognizing text, so I guess they were not worthy of combining or something.  I chose "recognize text" and saved each pdf, and then they combined just fine.

I was continuously having this issue on my Mac, when it dawned on me how to fix it. Very simple. I had been storing my files in iCloud, and usually don't have any issues. This time, however, I decided to open Finder, select the files, highlight them, right click and select 'Download'.  As soon as that happened, I was instantly able to pull them all into a single doc as I needed, and saved it, and access it later to attach it to an email. Now, I make sure my files are actually downloaded BEFORE I create anything, or make comments. It will save automatically back to the cloud as needed, or wherever you want to save it. 

I had this problem today on Macbook Pro 2020 running Ventura 13.4.1 (c) (22F770820d).

This problem is related to PDFs stored on a remote server. I was working on files from dropbox, and. even though I was working on local versions of the files as sync'd from DB, I got the bytes error trying to insert a PDF from file into another PDF. As soon as I copies the PDFs from the DB directory to a local location (my desktop), the problem was resolved. So I don't think this is related to if PDFs have annotations (although I didn't test this specifically, I think its related to permissions of a file that is sync'd with a remote server like DropBox or maybe others like OneDrive, Box, etc.

This only occurs when I'm using a thumb drive that ejects improperly on my Mac. The Bytes not Saved pop up displays which will not allow me to use any functions or work arounds. I have to force quit, losing unsaved work. As soon as I do that Adobe begins installing an update.  Is the only solution to keep checking for updates?  Why hasn't this been fixed?

hello mate jsut wondering if you need help in the toilet lol hahahahaahahha

I've seen a lot of replies for this and didn't find a solution but figured it out.

The PDFs / pages I was trying to add to another PDF were visible in my files, of course, but only in the cloud (so... the bytes were not ready...) -- once I clicked the little "download" icon next to the file name, and they downloaded to my computer, they dragged and dropped perfectly into the PDF file like normal.

The problem seems to occur whenever the file you have open is no longer available. Perhaps it was on a network share and you've lost your connection. Perhaps it was a temporary file that has since been deleted. I'm guessing the entire file is not kept in memory, and so the source file must be read from the disk in order to save your changes (even if you're saving to a new location).

I got this error today because I had opened a PDF document on a website, it opened in the Adobe's Acrobat extension for Chrome, I clicked the "Open in desktop app" button, and then left it open for a couple days in the background while I did other things on my Macbook M1. When I went to try and save it today after filling in the form fields, I got the "Bytes not ready" error. I pressed Command+D to see the file location, it was stored in /private/var/folders/xx/xxxxx.... as a .tmp file of some sort (which I just assume is where the Chrome extension's "Open in desktop app" button is intended to "save" it as a temporary copy, and it's just assumed you will save it to a proper location in fairly short order if it was a PDF you actually wanted to hold on to).

Since it wouldn't save, I re-downloaded the PDF to my downloads folder. I tried to open it so I could copy and paste from my form fields into this new copy. Acrobat refused to open the newly downloaded PDF. No error message or anything. Just... did nothing when I tried to open it. I had to resort to screenshotting the form, quitting Acrobat entirely, and then re-entering my form fields on the new copy. Luckily there wasn't much I needed to copy, but I would have been pretty upset if it had been a lot of work.

Seems like the fix for Adobe's developers is to figure out a way to preserve the source PDF's data somewhere in case the source file goes away. Maybe files under a certain size can be entirely loaded into memory (my particular PDF was only 516KiB on disk). Maybe make a copy in a temporary folder that Acrobat has control over so that it doesn't get deleted. At the very least figure out why I wasn't able to open another copy of that PDF so I could copy/paste form fields over to the new copy. Maybe hold a checksum of the PDF file (like a SHA256 hash), and if a user tries to open the PDF again with that identical checksum, automagically use that as the new source PDF. I'm just spitballin' here. It's not my job to fix Adobe's software. With perpetual licenses gone, Adobe should be rolling in cash to pay developers with. That way they can continue to deliver all that amazing innovation and the very best bug-free software that Adobe is known for. *cough*