ORA Database Error Messages ORA-16003: standby database is restricted to read-only access September 23, 2015 mpbod ORA-16003: standby database is restricted to read-only access Cause: To ensure its integrity, a standby database can only be opened for read-only access. Action: Re-issue the ALTER DATABASE OPEN specifying READ ONLY. Back to previous menu Share this:Click to email a link to a friend (Opens in new window)Click to print (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Pocket (Opens in new window)