I am getting this message "Lightroom cannot use the catalog named "Lightroom 3 Catalog" because it is not writable and cannot be opened"
When I select "Choose a different catalog", there is only 1 choice and it does not work.
There is a lock-file that should be deleted every time LR is closed. But - for unknown reasons - sometimes this delete doesn't happen and LR doesn't open.
In your OS (Mac Finder / Win Explorer) look at the files where the catalog resides. The catalog is the file with the ending <.lrcat>.
Now, when LR is not open if you see also a file called < ... lrcat.lock> delete this file. This file should not be present when LR is closed - but it should be present when LR is open.
If you don't know where to find the catalog, see here: http://kb2.adobe.com/cps/843/cpsid_84313.html
If this doesn't help, make sure that your catalog and/or the folder where it resides is not set to <read only>.
Thanks so much. I figured out that I had deleted the catalog, and I moved
it back onto my computer (I was cleaning out old pictures). However, now it
says that the catalog is corrupted and cannot be repaired. I think I can
use a default catalog to access the program? Do you know where I find the
default catalog? I have no idea what I'm doing!
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