How do you find the .lock file?
The .lock file is in the same folder as your catalog file. If you don't know what folder that is, then use your operating system's search feature to search for .lock files.
THANK YOU!!!!!! You saved me a LOT of time.
Thanks for this solution. Worked great today for me!
Thank you, I had the same problem.
But honestly Adobe… is it too damn complex to search for another lightroom process instead of asking the user to close a non existant process? If you don't find the process you can easily assume something crappy happened and delete the lock file by yourselves and then check the integrity of the database.
I mean… shouldn't be that complex right?
Thank you! Worked like a charm. I only encountered this error today for the first time after working with LR since release of version 1, and that was due to a sudden power outage. Glad that finding the solution was this easy!
oh no, i just did as suggested above. Great lightroom opens but all the grading i did on the pictures have gone! I even made a copy of the LRCAT file before deleting the lock file and LR was def closed as i just did a restart.
What happened to all the work i just finished? can i get it back. deadline 29 hours...
Removing the lock file works. Thank you!
I'm trying to find where to unlock this catalog but I cannot find it please help
The lock file is in the same folder as your catalog.
Unless you have told Lightroom to save it elsewhere, it wil be in the default location, which for Windows is somewhere in the My Pictures folder.
You can also find the location under Edit > Catalog Settings > General,
Thanks I found the file and deleted it and I am able to open the catalog now
thanks so much! this worked for me!
I made an account just to thank you! Thanks!
You helped a lot of people including myself, thanks a bunch!
Thanks Heaps. I was going crazy. Sue
Thank you for saving me so much work and worry!
Upgraded to Windows 10 and after a so called Critical update tried to run Lightroom and it asked for country and product code afterwards. After update some programs needed product keys re-activated but all my Adobe programs seemed fine for almost 2 weeks until today.
Worked perfectly for me, thanks! I was freaking out all day; should've looked for your wisdom earlier @DW_Harrison!
I had Windows 10 compatibility fears; looks like this has been a problem for awhile. So glad you asked the question @Harry_R_Matthews!
Thank you, deleting the .lock file worked!
I have the same problem, using windows 7, and cannot locate the file that is keeping this program from running. Can you be more specific with where the ".lock" is located.
The .lrcat.lock file is in the exact same folder as your Lightroom Catalog file.
deleted the ".lock" file and it worked. Thank you
bloody legend! same issue here, rebooted laptop mid lightroom 6 load up-computer said no was warmly greeted with the same message-until i found this ever so helpful thread-beers on me cheers
how do I find the directory that my catalog is in?
Thank you I had the same problem when my computer crashed after some fault, deleting the lock file was the answer.
OMFG! Thank you very much man, you saved me!
Thank you, it solved my problem as well!
Miami Wedding Photographer
deleted the .lock file...worked for me...
my computer rebooted and I couldn't open my catalog....I was going crazy...it would open a different catalog fine, but not my large catalog....so I did a search and found this post...thanks so much
How do you delete the locked file?
The answer has been given in several posts in this thread, like here: Re: Lightroom catalog cannot be opened because another application already has it opened
Or see this article, Lightroom basics - scroll down to "Some common problems".