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August 11, 2020
Answered

Acrobat Reader DC long file path

  • August 11, 2020
  • 19 replies
  • 69341 views

As an organization, we are using Windows 10 with the "LongPathsEnabled" registry entry set to 1, as posted here: Enable Long Paths in Windows 10, Version 1607, and Later 

This has helped us with moving long pathed files and opening them in Microsoft Office programs.

 

However, Adobe Acrobat DC (and Acrobat Reader DC) still cannot open files with paths longer than 255 characters. We have tested this in multiple scenarios and have found that Acrobat has this problem with any long file path. The file simply won't open or opens a blank document. If you copy the document to a short path, it opens flawlessly.

 

I have found several similar threads here , here and here . All mention it's a file path limitation of Windows. That is simply no longer the case. As seen in the top link, Windows 10 now supports file paths up to 32,767 characters. 

 

As linked in this thread here , user avn1 has correctly deduced that Adobe has not updated Acrobat to recognize the new MAX_PATH restrictions. That thread has several more responses but none from Adobe employees.

 

Could you please advise when Adobe plans to add long file path functionality to Acrobat products? Or at least acknowledge that you are working on it, please?

Correct answer BRossow

Actually ... enabling long file paths in the Windows registry fixed the issue. It was enabled on the computer I was referencing which should have been identical to the one having the issue, but it wasn't. Would delete my comment above if I could. Sorry for the false alarm.

19 replies

Participating Frequently
March 27, 2024

It seems you cannot open files with paths longer than 255 characters on Adobe. Have you tried Long Path Tool? It works for me. 

New Participant
January 17, 2024

Hi,

 

Not sure if this is still relevant but I resolved this by changing the regkey,

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem\LongPathsEnabled to 1

 

Then in adobe opening preferences, going to Security (Advanced) and then I just added the C:\ to Priveledged locations,

 

New Participant
January 17, 2024

Just also a side note, reboot is required after reg change

New Participant
October 12, 2023

I've run into the same issue and found that is it a OneDrive Sync specific issue, and an error occurs when trying to download the file. I found a workaround/fix where if you right click on the folder or file and click 'Always keep on this device', OneDrive will download it and then there will be no additional step of downloading before opening. 

 

The only con is that it will take up storage space, so the smaller/less nested the folder the better.

New Participant
October 27, 2023

Adobe we have waited long enough.  Install OneDrive, sync it with a sharpoint site with stupidly long paths and filenames and you will see our issue!

Known Participant
October 30, 2023

As I mentioned above, Adobe already supports long file paths. It is OneDrive that doesn't.

If you have a placeholder in your OneDrive folder that will create a long file path, OneDrive will fail to download it.

If you create a local file with long file path, Adobe Acrobat opens it up with no problem.

This is a Microsoft issue that I don't think will ever be fixed anytime soon, due to compatibity with other software that doesn't support long file paths. 

Known Participant
May 31, 2023

For those who are here having issues opening PDF files from a OneDrive sync location, Adobe Acrobat already support long file paths, and this is a OneDrive Sync Client / Windows Explorer issue.

I have tested this by deeply imbedding a PDF in SharePoint, synchronising the file, and trying to open it in Explorer and get the error. The placeholder for the file is there, but it won't download. Using the "\\?\" fix forces the file to be downloaded and then Acrobat is happy to open the file. Not sure why Microsoft has kept this limit, but might have something to do with copatability.

Maximum Path Length Limitation - Win32 apps | Microsoft Learn

Restrictions and limitations in OneDrive and SharePoint - Microsoft Support

Participating Frequently
June 13, 2023

This seems to be the issue I have just encountered - long file names on folders synced with OneDrive. Anywhere else, fine. In my OneDrive for Faculty folder? Too long and the path doesn't exist. Shortening works.

New Participant
March 30, 2023

Still experiencing the same thing - can't open PDF as the file name is too long....

 

Is there a 2023 patch for this?

 

https://community.adobe.com/t5/acrobat-reader-discussions/acrobat-reader-dc-long-file-path/td-p/11354016

New Participant
May 12, 2023

The fix is open pdf in another app. Openning in any browsers worked to me.

Participating Frequently
May 12, 2023

That's more of a workaround than a fix considering adobe costs a premium and is supposed to be the industry leader. 

New Participant
March 29, 2023

March 2023.  Still an issue.  I have a client that recently migraterd from a local server to Sharepoint, and the paths are longer.  For files deep in the folder tree this still occurs.

When opening from Explorer you get a path not found error.  When attempting to open from within Reader, you get an explicit Path too long error.  Verified that this was on the newest version of reader, and occurs with 64 or 32 bit installations of Reader.

This is stunningly ridiculous, especially since Acrobat and reader are the same code base and it occurs to paying customers of the full version.

Adobe Employee
February 21, 2021

Hi
Adobe Acrobat and Reader official update (21.001.20135) containing the fix for this issue is now available.

This update will be automatically pushed to all existing installations of Acrobat and Reader. You may also manually trigger the update early by opening the application and going to Help > Check for Updates.
More information about this release is here: https://helpx.adobe.com/acrobat/release-note/release-notes-acrobat-reader.html
Please try it out and let us know your feedback!

Thanks!

New Participant
May 19, 2022

Still not fixed. Absolutely ridiculous

AkanchhaS8194121
Brainiac
July 31, 2022

Hi guys,

 

Is there any resolution to this??

 

It's very annoying!!!

 

Casey


Hi,

Thanks for sharing the screenshot. Version 2022.001.20169 is the recent one. Let us discuss this with our engineering team and get more clarity.

We appreciate your patience. 

 

~Akanchha 

New Participant
February 20, 2021

Did Adobe support ever respond to you?  Do they care to fix major issues like this?

New Participant
February 20, 2021

Adobe support is still claiming that this issue is a Windows issue and not an Adobe issue.  Their close minded, attitude is offensive.  They act like their "solution" is the only way to aproach problem solving an issue.  Their attitude is not a collaborative one.  I was treated like I don't understand basic issues.  It is hard to collaboratively problem solve, when I request for the agent to speak slowly and clearly, but I still struggle to understand.  The language barrier is a problem.  I asked for a definition of provisioning, and I was given a condescending attitude.  My money is as good as anyone else's and I don't appreciate being treated like I don't get it.  Funny how they blatantly lie, about the programatic architecture.  I asked about character limitation issues, but I did not get an answer.  They gaslighted me, to make me feel like I didn't understans the issue, but I was getting it.  I wanted answers before I made a system wide decision, and my files were deleted without my consent.  Be aware, that if you change your login data, that globally, your files will be affected.  They do not have a means of batch processing back up of data; you have to back up files one by one.  If you want to be gaslighted repeatedly, call Adobe customer support.