I was trying to free up space on my start up disk. I deleted files from my Lightroom that I did not need any more and now my Lightroom will not open. Very annoying as I've a wedding shoot to edit. Talk about worse timing ever. A window pops up when I'm trying to open the application with the heading 'Corrupt Catalog Detected'. It says that the catalog needs to be repaired. I click on the button to repair it and another window pops up saying that Lightroom encountered problems reading or writing from disk and to Try Again. All attempts made to 'Try Again' completely fail.