I just started getting an error message when attempting to start LR5.6, after which it closes.
"Lightroom encountered an error when reading from its preview cache and needs to restart"
"Lightroom will attempt to fix this problem next time it launches"
Multiple retries give the same error. What can I do to correct this?
You need to delete or rename your preview cache and allow Lightroom to rebuild it.
It is in the same folder as where you store your catalog. It is called yourcatalogname previews.lrdata. Rename it and start Lightroom. It may take a while for your previews to be rebuilt if you have many images. If everything works out ok, you can delete the old previews
thanks Rikk - I imagine that it will indeed take " a while" to rebuild 50K+ previews...