Error "Invalid Identifier" occurs when opening a file that contains Oracle 10g keywords such as "member of". The code compiles fine however the Object Navigator on the left hand side with display incorrect results.
WORKAROUND:
None
STATUS:
Issue fixed in version Toad for Oracle 9.7.2. The latest version of Toad for Oracle can be downloaded:
https://support.quest.com/SUPPORT/index?page=downloads