Photoshop: Selecting Save for Web gives error: "Could not complete this operation. An unknown operating system error has occurred."

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  • Updated 2 months ago
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When I select Save for Web if displays an error: "Could not complete this operation. An unknown operating system error has occurred."
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Photoshop FAQ, Official Rep

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Posted 8 years ago

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Jeffrey Tranberry, Sr. Product Manager, Digital Imaging

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Official Response
Reset Photoshop's Save For Web preferences:

1. Quit Photoshop
2. Delete the "Adobe Save For Web 12.0 Prefs" file:

Mac: Users/[Username]/Library/Preferences/Adobe Save For Web 12.0 Prefs

Windows XP: Documents and Settings/[Username]/Application Data/Adobe/Save For Web/12.0/Adobe Save For Web 12.0 Prefs

Windows 7 and Vista: Users/[Username]/AppData/Roaming/Adobe/Save For Web/12.0/Adobe Save For Web 12.0 Prefs
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Jeffrey Tranberry, Sr. Product Manager, Digital Imaging

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Thanks. I'll update the path.
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fitzage

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It's possible that both files need to be deleted, because I tried your method first and when that didn't work I tried the other method. Or for some people maybe it's one and others it's the other.
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Foster Brereton, Programmer

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FYI, For Windows Vista / 7 the Path is:

C:\Users\[user]\AppData\Roaming\Adobe\Plugins\Adobe Save For Web CS5\Photoshop\
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ShErri Chaudhry

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i do not have plugins folder either i can't find adobe saver for web cs5
i am using cs6
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Bhavna Nagpal

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I can not find the library/preferences/Adobe folder and nothing related to save for web on my macbook running a sierra 10.12.6 with CC2017
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Robert Harms

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I have the same problem on a recurring basis. I have deleted both preference files in Library:
Library/Preferences/Adobe Save for Web 12.0 Prefs
Library/Preferences/Adobe/Plugins/Adobe Save for Web CS5/Photoshop/Adobe Save for Web CS5 Prefs
and then the problem goes away only for a short period before it resumes.
I also in desperation deleted the whole folder:
Library/Preferences/Adobe/Plugins/Adobe Save for Web CS5/

Photoshop always immediately rewrites all these. But the problem recurs.

I have recently installed CS5 Design Suite 5.5 Design Premium on a new iMac12,2. My Photoshop is 12.1.
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Jeffrey Tranberry, Sr. Product Manager, Digital Imaging

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Hi Robert, would you mind if I contacted you directly through email and get a set of the problem preference files from you for investigation?
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Robert Harms

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please do. I'll be here for the next hour.
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Roger Dean Oldén

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I have the exact same error and tried deleting both files but it simply wont work.
Would it perhaps be possible to replace them with someone elses working preferences? or do I need to reinstall?
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cake and bacon

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If you're on a Mac I was having the same issue and it was related SIMBL. I uninstalled SIMBL and any apps which required it and Photoshop started working properly.
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Chris

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OMG. Searched on Google all day...YOU ARE MY SAVIOR! SIMBL ftl people...SIMBL ftl.
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Gabriel U.

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Lucky you! :D

There was nothing like this when I was dealing with the problems so I did a clean install of Lion, installed CS5 trial and reinstalled each app I previously had. I tested CS5 after each app that I reinstalled.

I'm glad I helped someone by posting this.
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Chris

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That would've taken me a week D: It's such a specific issue, I'm so glad you posted it...
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jmgraffix

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I've deleted the prefs file as suggested above and I'm not getting it to work. Someone mentioned previously that it works for a little while and then resumes again. It is not working for me period. I'm running Photoshop CS5 12.0.4 on Mac OS X v10.6.8.
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Robert Harms

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I have CS5 12.1 x64 with Mac v10.6.8. There has been no problem for over 4 months now, but two days ago it recurred, just once. The file I wanted to save was a tif. I then saved it as a normal jpeg and then was able to Save for Web.
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Mark Bult

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Trashing that prefs file does not work.
CS5, OS X 10.6.8.
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Scott W

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I realize this is a year old but I'm suddenly hitting this issue with Photoshop 13.0.4 and Mac OS 10.7.5

Anything I try and Save for web presents...


I've deleted all Photoshop CS6 predf in ~/Library/Preferences including the com.adobe.photoshop.plist file

I've reinstalled the mac OS 10.7.5 combo update.

Rebooted several times

Repaired permissions and verified the disk.

Things were fine 3 hours ago, now no save for web completes. I've done nothing to alter the system between when it was working and now that it is not. All that has changed is the date.
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Brandon Leung

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Using Photoshop CC, same issue here. On OSX 10.9

This is really frustrating...
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Chris Cox

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Well, the message is there for UNKNOWN operating system errors - things that we don't expect, haven't seen, and don't know how to handle.

Bugs in new operating system versions could cause that...
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Brandon Leung

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Actually my message is slightly different.

Photoshop CC 14.1.2

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Chris Cox

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Does that happen after showing the save dialog? Have you tried changing it off of coverflow mode? (that's a known OS bug in 10.9)
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Brandon Leung

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This error pops up when trying to change the directory to save the file.

I actually just changed it from coverflow mode, and so far it seems to be okay.
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Chris Cox

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Yep, sounds like you were hitting the known OS bug.
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Brandon Leung

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Good to know. Thanks for your help!
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Scott W

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Note my resolution for the Mac OS when this occurs, which is random - perhaps once or twice a year it seems.

Navigate to....

[volume]/Users/[you]/Library/Preferences/Adobe/Plug ins/Adobe Save for Web CC (or CS6 or CS5)/Photoshop

NOTE: THIS IS NOT THE STANDARD PREF FILE LOCATION.

You'll find 1 file there.... a Save for Web preference file. -- Adobe Save for Web CC Prefs -- Trash that file. THAT seems to be the file which causes the error here, and not the file open in the preference directory.

Seems there are multiple preference files for Save for Web. I'm not sure why, but it is this buried file which causes the issue on my Macs.
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keith faber

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I have run into this a few times in CC for Windows 7, and I have a solution for this--at least for me.

Whenever I "save for web" and save something to the root of C:/ it will work, but the next time I "save for web" it produces the error. I was able to fix it by going into User Account Control settings and scaling down to "never notify." It requires a reboot, but the next time I "saved for web" it worked fine.

If you do this, be sure to change the UAC back to "default" as it is a security measure.

FYI you will have to restart anytime you tweak UAC.

To change UAC in Win 7 go to control panel>Action Center>Change User Account Control Settings and drag the slider to "never notify."
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Nicole Villaverde

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Having same issue - Mac OS X 10.9, Photoshop CC. I don't even have a library folder on this new computer so this link does nothing for me..
Users/[Username]/Library/Preferences/Adobe Save For Web 12.0 Prefs

Can anyone help?
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Scott W

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Nicole, read my post 2 posts above yours. There's a second, hidden, preference file that needs to be deleted. Simply removing the standard preference file won't help (at least it doesn't here). [volume]/Users/[you]/Library/Preferences/Adobe/Plug ins/Adobe Save for Web CC (or CS6 or CS5)/Photosho
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Nicole Villaverde

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yep - I did both and still not fixed
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Jeffrey Tranberry, Sr. Product Manager, Digital Imaging

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Update OS X and/or disable Coverflow: http://helpx.adobe.com/photoshop/kb/f...
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Nicole Villaverde

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Ah ha! That was the issue!! I disabled Coverflow and it works now. Thank you Jeffrey!
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Jeffrey Tranberry, Sr. Product Manager, Digital Imaging

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This should be also be fixed if you update OS X to the latest version 10.9.2...
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Amber Carbo Privizzini

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Thank you so much. This worked for me great!!!!!!!!!!
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Alvaro Lopez

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I did all the above and it is not working, is anyone else having trouble with this? :/
Using Mac OS X 10.9.4
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Sara Bequette

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I'm having this problem. I use Creative Cloud. I deleted the save to web preferences from the Adobe CC 2014 folder (as discussed above), but it does not help. This is an something I do VERY OFTEN and am beyond frustrated today. I've never encountered this before and I'm unsure what to do to fix it...
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Lyndsey Weedop

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I was having the same trouble and deleting the pref file didn't work for me either.

I ended up discovering that my file name was too long to save to the server I'm using. If you're trying to save remotely, try saving locally and see if that works. If so, it may be due to the file name length.
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Pie King

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Solution for Windows 8(or 8.1) and possibly Windows 7 and 10! After an abominable waste of so much time, I finally realized that my image(along with canvas-but that's irrelevant) was way too big! Almost 40,000 inches big! I initially wanted the image to be 70x70 pixels in widthsxlength! Tried Save for web once more and BAM!! Optimize was successful! So...yah, check your image size before spending a good 45 minutes of your life trying to find a solution on the web(irony, right?)
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Andrea Haupt

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Spent the last 2 hours working on this and you were right, my file was just too big.
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Khokha Omar

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me to i am lost 3 hours  working for this problem ..in the last my file its big ... you were right
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Klim Sergeev

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Users/[Username]/Library/Preferences/Adobe Photoshop CC Settings/Save for Web Prefs.psp

Trashing this one helped (OSX). And more, here: Users/[Username]/Library/Preferences/Adobe/Plug ins/Adobe Save for Web CC (or CS6 or CS5)/Photoshop - you'd better trash the whole Adobe Save for Web folder, cause there may be something wrong with it