[James Gifford]

It was in the CurrentVersion.fcpevent file which was one folder level down from the main library, not the individual event files in the event folders another level down. I am not sure if this file refers to all the events or not – sorry my technical knowledge is not that advanced! But it was a process of trial and error – we only knew which file was corrupt after we had fixed the problem.

[James Gifford]

Thanks for replying – yes forgot to mention that – all backups were the same – ie none of them worked. I had tried Pro Maintenance which said the project was corrupted, but after a full day trying absolutely everything, I managed to get sorted thanks to Apple Technical Support. In the end it involved going into one of the backup library files and the corrupted library file and replacing one of the event files with the equivalent one from the backup file. More a process of trial and error than anything else but so glad it worked and was pleasantly surprised by Apple’s service and willingness to help.