Lightroom 5.3 error when reading preview cache

I've browsed a few previous forum questions and answers and it appears I might need to find my catalog and delete my preview cache file(s). However, I cannot find where these files are stored. A few of the forum responses said to go into Lightroom edit/preferences to find where these files are stored, but I cannot get into Lightroom. When I open it, it gives me the error message and I can't seem to get into edit to find where these files are stored. Any help or suggestions would be greatly appreciated!!!!
Also, I'm relatively new to Lightroom (been using it for a little over a month, mostly just editing and not much for cataloging and organizing my photos), so I apologize in advance for any "stupid" questions.

You don't say what platform you are on, Windows or OSX. If you haven't determined for yourself where you wanted your catalog to be located, it will likely be in the default location. On Windows this will be "c:\users\your username\My Pictures\Lightroom\Lightroom 5 Catalog.lrcat".
On OSX it will be "Macintosh HD/Usres/your username/Pictures/Lightroom 5 Catalog.lrcat".
Irrespective of the platform, the previews cache will be alongside the catalog and will be called "Lightroom 5 Catalog Previews.lrdata", so using Explorer/Finder locate and delete the file ending in "Previews.lrdata" (NOT the catalog itself, ending in "*.lrcat"). Lightroom should then start again, and will gradually start to rebuild the previews.

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You have a corrupt preview cache, that's what the message is telling you. To fix, you need to delete the current preview cache (Lightroom will start to rebuild a new one when you then start it). To delete the cache, use Finder/Explorer to go to the folder that contains your catalog. In the same folder will be the file named the same as the catalog but will end in Previews.lrdata, e.g. it will be something like "Lightroom 5 Catalog Previews.lrdata". Delete this file (taking care NOT to delete the file ending with ".lrcat"), then Lightroom should start OK.

Have a problem with Lightroom 5.4. Since the program crashed yesterday it won't launch, it comes up with the message "Lightroom encountered an error when reading its preview cache and needs to quit". " Lightroom will attempt to fix this problem net ti

Have a problem with Lightroom 5.4. Since the program crashed yesterday it won't launch, it comes up with the message "Lightroom encountered an error when reading its preview cache and needs to quit". " Lightroom will attempt to fix this problem next time it launches". Except that it doesn't, I keep getting the same message and the program closes. Does anyone know what I can do to repair it? Can't back up, can't do anything.

There are dozens of threads in this forum that describe the fix

Lightroom encountered and error when reading from it preview cache and needs to quit

A power outage caused my Lightroom 5.2 to shut down without closing. When I powered back up and opened lightroom it gives me an error "Lightroom encountered and error when reading from it preview cache and needs to quit" and then it says it will try to fix it the next time it opens. I have opened it 20 times and it is not fixing it. I removed the program completely and upgraded to 5.5 AND it is still giving me the same error. Is my catalog corrupt or something? I had it set to automatically load the most currently used catalog, so it is not allowing me to open or start a new catalog either. HELP!!!

Search the forum, this has been answered many times.

Lightroom encountered an error when reading it's preview cache

I been getting this error for over 2-3 months and thought it would go away with the new version releases, i tried all the standard fixes,deleting the catalog,compacting etc. even moving it to new folder, reinstalled the software twice. The whole nine yards. IMHO, there's a problem with the software, it may be uique with differetent type of machine setup or a corrupt file in the in the catalog and the compacting doesn't fix it.
The error always happens while in the develope and crashed, has to leave the software (sometimes it just hangs the software and you have to kill the task manually). You have at least 10-15 seconds before going back in, otherwise it will still crash, a thread is still occuring from the orginal crash and still completing it's task. That's the error, annoying as heck.
My only hoping is a new version of LR comes out soon (4.0) and it goes away, otherwise, I'm going to find something else-- driving me crazy, I spend about 10-15% of my time each week getting out and back in to make go away, then can go for a day(s) sometimes and no problems. I tried recreating the problem on specific photos where I think it might be corrupt, that doesn't give any clue, there is no pattern to this at all, it happens randomly on new photos and old photos, yet i can go back to those photos again and no problems.
Any NEW ideas would be appreciated (no compact, no new catalogs, new installs, turn off various options cache preview etc. move to new folder and more.....done that etc.).

The error is exactly what's it in the title of the post, Lightroom encountered an error when reading from its preview cache and needs to quit. That's it.
I don't know what else to tell you, i wish I had more. This is all over the internet, I followed pretty much all the solutions, delete the catalog or delete the preview folders (tried both). Tinker with the cachee preferences.   Most people kill the preview folders and the catlog gets recreated and there problem is resovled, doesn't work for me.
No cloning, totally two different catalogs (not networked etc.) a good question though.
When I am refering to catalog and cache, I strictly talking about LR only, nothing outside of that or in the operating system, just LR files only, here they are:
I have a   LR catalog folder called--->   C:\Users\Mark\Documents\LightRoom Catalog\LR_Catalog
you have another folder called: LR_Catalog Previews.lrdata   (with many subfolders underneath at)
and I have LR catalog filein C:\Users\Mark\Documents\LightRoom Catalog\LR_Catalog
LR_Catalog.LRCAT
That's it, a file and a folder with many sub-folders. I'll get a screen print with error next, but it's basically what I said earlier in the beginning, you can be in develope or even the library, and error occurs in a message box, you hit ok and the application exits. On average it can happen 6-7 times with an hour and sometimes not at all, working with same the photos. Sometimes it can happen within mintues, sometimes not at all for over 2 hours. There is no specific pattern to it.

I'm unable to open up Lightroom 5, I get this message in a pop up box: "Lightroom encountered an error when reading from it's preview cache and needs to quit" Underneath that is "Lightroom will attempt to fix this problem the next time when it launches."

I'm unable to open up Lightroom 5, I get this message in a pop up box: "Lightroom encountered an error when reading from it's preview cache and needs to quit" Underneath that is "Lightroom will attempt to fix this problem the next time when it launches." It hasn't, what should I do? Thanks Shawn (Irish Se7en) .

Can you try to rename (not delete!) the folder named "YOUR_CATALOG_NAME Previews.lrdata" and restart Lightroom?

"Lightroom encountered and error when reading from its preview cache and needs to quit"

I keep receiving this error every time I open LR, "Lightroom encountered and error when reading from its preview cache and needs to quit" and the app won't open. It said LR would try and fix this error next time I opened it but the error remains. I tried uninstalled and installing the app and the error remains.
Any Ideas here? Is there another app that may be telling it where to look for the cache and it no longer there? I was using a ramdisk for a bit but ditched it. Not sure if that has something to do with it but it seems suspect.
Your thoughts?
--Kenny Brandon Wilson

Talked to Adobe support this morning, this is their response in case anyone else is looking for help. I'm running a Windows 7 box, LR 5.6.
Gokul: Click on start and type %appdata%, then open roaming folder.
Edward: ok
Gokul: Open Adobe folder.
Gokul: Open Lightroom folder.
Gokul: Open Lightroom folder> Preferences.
Edward: ok
Gokul: Rename Lightroom 5 Preferences.agprefs file as Lightroom 5 Preferences.agprefsOLD.
Edward: OK
Gokul: Please check if you can launch Lightroom without any error.
Edward: it shows me a welcome screen and is asking me to select my country
Edward: aka, register the software
Gokul: You can skip and launch it.
Edward: LR catalog not found
Gokul: Please select the catalog.
Edward: my original catalog?
Gokul: Yes.
Edward: testing integrity of catalog
Edward: loaded just fine
Gokul: Okay.
Gokul: Please check if you can re-launch it again.
Edward: yes, it worked!
Gokul: Excellent!
Gokul: Since your preferences were corrupted you were facing issue so we renamed the preferences file to reset it.
Edward: aha....ok
All of my import/export presets were intact along with develop user presets. I'm happy as a clam for my $10/month!

I keep receiving this error every time I open LR, "Lightroom encountered and error when reading from its preview cache and needs to quit" and the app won't open. It said LR would try and fix this error next time I opened it but the error remains. I tried

I keep receiving this error every time I open LR, "Lightroom encountered and error when reading from its preview cache and needs to quit" and the app won't open. It said LR would try and fix this error next time I opened it but the error remains. I tried uninstalled and installing the app and the error remains. I have windows 8. Can anyone please help???

Use Windows Explorer to open the folder containing your catalog. The normal location is Pictures\Lightroom. Locate a folder with the extension .lrdata and delete that folder. Then you should be able to start Lightroom again, and Lightroom will begin building and new previews folder. Do not delete anything else.

Error Launching LR 5: "Lightroom encountered an error when reading from its preview cache and..."

Error Launching LR 5: "Lightroom encountered an error when reading from its preview cache and needs to quit. Lightroom will attempt to fix this problem the next time it launches."
I've tried renaming my catalog.lrcat file. I've copied over my most recent backup of the catalog.lrcat and that didn't work either.

On Mac:
PS - to open the previews "folder" (a "package" is just a "special" folder) on Mac, ctrl-click and choose "Show package contents.." - same way you open any other special folder, like .app or .lrplugin..
Rob

Lightroom encountered an error when reading from its preview cache and needs to quit. Says Lightromm will attempt to fix the problem the next time it launches, but on every re-launch I get the same message. Any clue as to how to fix this problem?

I recently updated my HP laptop's OS from WIndows8 to WIndows8.1. When I went attempted to open Lightroom5 I got the following message:
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"Lightroom will attempt to fix the problem the next time it launches"
Every time I relaunch I get the same message. I'd like to understand what might be causing the problem so I can remedy and get back to my photo editing. Any clue as to how to fix this problem would be greatly appreciated.
JPM

reset your preferences, Resetting (or 'Trashing') the Lightroom Preferences file - Lightroom Forums

"Lightroom encountered an error when reading from its preview cache and needs to quit. How do I fix this

Recently updated to Windows8.1 got the message: "Lightroom encountered an error when reading from its preview cache and needs to quit. Lightroom will attempt to fix the error the next time it launches" Get the same message on multiple launches. Anyone know how to fix this?

Re: "Lightroom encountered and error when reading from its preview cache and needs to quit"

When backing up lightroom 4 catalog, get message "lightroom encountered an error when reading from its preview cache and needs to quit" this occurs during optimization stage of backup

i upgraded from lightroom 4 to lightroom 5 and installed it on a separate hard drive. Initially had no problems util my computer crashed due to the failure of the drive on which Lightroom 5 was installed. Since having my computer rectified, i am unable to use lightroom 5 getting the message "lightroom encountered an error when reading from its preview cache and needs to quit"
I can still use lightroom 4, however, i get the same message when i try to backup the catalog. This occurs during the optimisation phase of backup.
I suspect it is related to Lightroom 5 creating a catalog from the Lightroom 4 files and cannot now locate those files or that they have been corrupted.
Would appreciate any solutions / suggestions.

You need to delete your preview cache and have Lightroom rebuild it. Cache location can be found here.
https://helpx.adobe.com/lightroom/kb/preference-file-locations-lightroom-41.html
Why And How To Clear Your Lightroom Cache - Lightroom Fanatic

Lightroom encountered an error when reading from its preview cache and needs to quit. Lightroom will attempt to fix this problem the next time it launches"."

Lightroom encountered an error when reading from its preview cache and needs to quit. Lightroom will attempt to fix this problem the next time it launches"."Help
Please

Stan Blumberg wrote:
I have deleted the file but the message persists even after restarting the computer....any advice??...I am using LR 5
You don't delete a file, you have to delete a folder. Is that what you did?
If you deleted the folder specified above, and you still get the message, then it's the wrong folder. Use your operating system's search function and find ALL folders on ALL disks whose name ends with Previews.LRDATA, delete each one found, and then try opening Lightroom.

I have a question about Lightroom 5... I used it last night, I go to get on it today and its will not open. I have an error msg "Lightroom encountered an error when reading from its preview cache and needs to quit" Lightroom will attempt to fix the proble

I have a question about Lightroom 5... I used it last night, I go to get on it today and its will not open. I have an error msg "Lightroom encountered an error when reading from its preview cache and needs to quit" Lightroom will attempt to fix the problem when reopened

https://forums.adobe.com/message/6219922#6219922
See if the issue in the thread above helps you to solve your problem.

When I tried to open Lightroom 5.4 today I got a msg that says "Lightroom encountered an error when reading from its preview cache and needs to quit. Lightroom will attempt to fix this problem the next time it lauches". What do I do? I get the msg each ti

"Lightroom encountered an error when reading from its preview cache and needs to quit. Lightroom will attempt to fix this problem the next time it lauches". What do I do? I get the msg each time I try to open it.

It isn't a file, it's a folder. It will have the same name as your catalog, but will have the extension data. It will be in the same folder along with your catalog. If you need to use the search feature to search for *.lrdata.

Lightroom 5.3 error when reading preview cache

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