Lightroom - all offline file previews have gone!

[Davi]

Having a bit of a meltdown here... I have a very simple workflow that means my files only stay on the main PC as little a time as needed before backing up. I've used the same system since 2010 with no problem, offline images just show as offline images, but the preview etc is all there to see.

I've just made my '2013' catalogue but then quickly needed to go back to something from 2012 so opened that catalogue... now, all the preview screens are blank grey!

Any idea's folks?! dont fancy trying to remember which of 6000 images is the one I need

[Craikeybaby]

If you connect to where you keep your images and select all the images and generate previews, they should all come back.