LR 5.7 "encountered an error when reading from its preview cache". Happened the other day, I went to a day old backup and continued working. But now it happened again. LR renamed the catalog "Lightroom 5_ANDERS-OFFICE8_Mar-15-230042-2015_Conflict".

I installed 5.7, ran ok for a while. Then it gave the error message that the preview cache was bad. A few times I have gotten this message and it restarts and repairs it. But now it couldn't. Renamed the Lightroom 5 catalog with the name "Lightroom 5_ANDERS-OFFICE8_Mar-15-230042-2015_Conflict". I got a backup and ran with that, and after a few days it happened again. It cannot repair and read the cache and shuts down.
What should I do? I can probably go to a backup again, but I keep losing work. I now backup every day.
But I need the system to be stable.
This is Windows 8.1. Lots of RAM and disk space.

The catalog isn't the problem, but rather that preview file. Use Windows Explorer or Finder (depending on your operating system) to browse to the folder that contains your catalog. Locate and delete the folder that has the extension .lrdata. Then you should be able to start Lightroom normally and it will begin generating a new cache file.

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Delete the preview cache using your operating system. It is a folder whose name ends with Previews.LRDATA. Do not delete the Lightroom catalog, which ends with .LRCAT

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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
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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

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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.

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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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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. 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.

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Hi, Have a look under the "MORE LIKE THIS" on the right there should be an answer in one of those threads.

Lightroom crashes at start up with the error message "Lightroom encountered an error when reading from its preview cache and needs to quit". Please advise on how to fix this error. Thanks

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You probably need to delete your preview cache. See here
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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..
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Lightroom encountered an error when reading from its preview cache and needs to quit. Lightroom will attempt to fix this problem next time it launches. " But it doesn't fix it!

I get the following window on loading Lightroom 5.7 -
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Using your system browser (Windows Explorer or Finder), open the folder that contains your catalog. In Windows it is in your pictures folder and then in a Lightroom folder. Inside of the Lightroom folder you will find another folder that has the extension .lrdata. It will have the same name as your catalog except for the extension. You need to delete that folder, and then start Lightroom again. Lightroom will generate a new previews folder, and you should be back in business.

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Open the folder containing your catalog. In that folder you will find another folder with the extension .lrdata, and you need to delete that folder. After you do that, Lightroom should start normally and will create a new preview cache.

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Quit Lightroom
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Using your system browser, go to your catalog folder and look for a folder with the extension .lrdata and delete that folder. You will have the same name as your catalog but with the different extension. DO NOT make the mistake and delete your catalog. After you delete that folder Lightroom should start and will begin building a new previews folder.

LR 5.7 "encountered an error when reading from its preview cache". Happened the other day, I went to a day old backup and continued working. But now it happened again. LR renamed the catalog "Lightroom 5_ANDERS-OFFICE8_Mar-15-230042-2015_Conflict".

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