Why do I get no longer previews generated when importing with LR 3.4.1?

Problem: This week when importing a batch of 900 + photos all appear in the library as grey boxes (no previews).  I still see excerpts from all my photos already imported and the nine are normally visible, in which they are seen with other programs (e.g., Canon Zoombrowser, my images).

Also, when I close LR3 and select the backup option I get the error "Lightroom has encountered an error when you try to read his preview cache and needs to stop smoking - Lightroom will attempt to solve this problem, the next time it starts.  After clicking OK to the LR3 pop-up error freezes and does not close, it runs only with Lightroom (not responding) on the top of the window.

Environment: Windows Vista Home Premium, Lightroom 3.4.1 photos are digital DSLR 7 d and Canon 40 D raw CR2 format. The catalog is on a 2 TB external USB drive connected to my laptop Lenova Thinkpad.

I have more 40 000 pictures in my catalog, more of the same photo, and I REALLY want to start over or having to regenerate the insights that a lot.

I tried import using both copy and copy as DNG with the same result - not found in the library.

Tried to import via a USB card reader and a USB memory card after moving them to the card memory to another laptop - same result.

Tried to manually select some photos and standard previews new rendered, LR3 begins rendering by the status in the upper left box, but no progress toward generating a preview in the library mode.  He's right there.

I can see the pictures in mode develop when I chose one to view AND, it seems, to stay there when I move back to the library.

But, when I try to close LR3 (with the above error / crash) and restart it, the previews generated in mode develop disappeared.

Is there a relatively simple solution to this?  I had not run into this all using previous levels of LR3.

Thanks a bunch!

Jim

Jim,

It seems that your preview cache has become corrupted. He has a record that lives in the same folder as your catalog named .lrdat. Try to rename it to something else and then running Lightroom. You can now generate previews that you couldn't before? If you can, you can then restore your previews and delete the cache of your old preview (the file that you renamed).

HAL

Tags: Photoshop Lightroom

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