Lightroom 4: says catalog already open by another application

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  • Updated 5 years ago
  • (Edited)
My LR 4 doesn't work with Windows 8. I get an error regarding the catalog file already being open by another application - even though nothing else is running. HELP....I'm stuck.
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Purvi Shah

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Posted 5 years ago

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Photo of John R. Ellis

John R. Ellis, Champion

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Have you rebooted?