I can’t open an archived copy of a database.
If I use DevonThink:File:Open Database it shows name of database grayed out with filetype dtBase2.zip
In Finder database file is not grayed out
Double click generates Archive Utility and I get message “Unable to Expand [filename] Error - 1 - No such process.”
I don’t access this database very often, but it’s got very important material in it. I’m trying to stay calm and hope someone can help.
DCB
Zipped archives have to be unzipped first before using them with DEVONthink. Is there enough disk space left to unzip it, does it work after rebooting?
Hi Christian. Unipped with what? All I have is the Mac Archive Utility and it gives me an error message. Have I missed an unzip command within DT? There’s plenty of disk space.
Did you check the permissions of the zip, did you try rebooting? The error message shown by macOS is of course not really helpful.
Double click on the zip file opens Archive Utility and it tries very hard but then confesses it can’t open it.
unzip <filename.zip> (without the angular brackets, please) in Terminal should work. Unless the file is corrupted, that is.
@DCBerk The unzip command has a “-t” option to test the archive. Might help. See “man unzip” for all the options. As @chrillek suggests, might be a corrupted zip file. Why? Perhaps shortage of diskspace, permissions, or a flaw on disk? Dunno.
The ZIP file isn’t your only backup… is it? 
Well, if you backup a corrupted file … Fortunately, I do redundant backups and found a good one, but I had a bad hour or two there.
Remain puzzled, however – always a good idea to learn from these mishaps. Several pieces of advice above came in after I quit and went to sleep, but I plan to try a few of them today and see if I can crack that file open. Thanks everybody.
I don’t normally use archive for backups (not concerned with disk space), so not sure how this one came to be in the first place. Do they tend to be more corruptable?
Not any more than any other file. However, you may want to do some maintenance on your machine to ensure your disk is healthy. Data corruption – which is not common – can be caused by failing hardware.
Only due to their size it might be more likely that hardware failures of harddiscs/SSDs will affect them. But apart from that they’re just ordinary files.