[phenomshel]

Sorry if this is a duplicate. I did search, (check my profile, I know how the system works) and found a few things that might be related, but nothing exact. It's possible I may have missed it though and if so, my apologies. The suggestion I found for what looked like related issues was that something was locking or blocking the cache files. There is no virus software or filesync apps on the machine that could cause that. See Chris's remarks below.

I'm running a Mac Mini, with Catalina. I can't get any of my ebooks to open in the viewer. A screenshot of the error is below. It appears that the problem is permissions, but even Chris the genius IT husband couldn't figure out why it's happening. I did update to the latest version of calibre, no luck. This has been happening for several versions/updates, it just now got to be a big enough nuisance for me to try to diagnose the problem.

"The metadata.opf goes into Library/Caches/calibre/ev2/t/tmp****** with permissions of 700. Nothing else is accessing it, lsof comes up empty on metadata.opf and everything above it. ps -ef comes up with nothing as well. If it is supposed to have something other than 700 permissions (and that shouldn't matter anyway unless Calibre is running as something other than $USER) why are cache files being created that Calibre itself should be able to access but can't?"