Unable to launch Lightroom due to an error message.

yesterday Lightroom was working fine.  Now I get this error message everytime I try to start Lightroom. - Lightroom encountered an error when reading from its preview cache and needs to quit.  I tried reinstalling Lightroom to no avail.  I cannot use Lightroom.  What happened?  How do I fix this?

Hallo Kaethe Ko,
The previews folder can grow quite big without any problems.
Mine is ca. 115 GB, for a catalog of 113'000 images and 1.6 GB size of the lrcat-file.
That works pretty fine.
So you might have had a corruption problem. Of course this should not happen. For such catalog-preview-sizes it would be really inconvenient, as recreation by LR would take a week running in the background.
Hopefully your overall catalog size was not that big that the previews-recreation will take so long.
Cornelia

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