Can you open them from the File menu in ID?
Does anythng happen when you try? Is it just some files, or all files? Have you restarted the computer? Does it wok if you log in to the computter on a different user account?
It is just some files not all.
If I double click one of the corrupt files it opens indesign & its toolbars but no artwork.
I restart my computer daily. Same issue in a different account.
I tried to duplicate the file in the FInder & got this error -
The Finder can’t complete the operation because some data in “File Name.indd” can’t be read or written.
(Error code -36)
Sounds like the files are damaged.
How do I repair them?
You may not be able to. Do you have any backups?
There's a script that will attempt to blind-open and export to .idml, but I don't expect it to work if you can't even copy the file. See Adobe Community: InDesign 6 is crashing when attempting to open a particular document. All others are opening OK.