ORA Database Error Messages ORA-01230: cannot make read only – file string is offline June 2, 2015 mpbod ORA-01230: cannot make read only – file string is offline Cause: An attempt to make a tablespace read only found that one of its files is offline. Action: Bring the file online and retry this command. Back to previous menu https://support.oracle.com/ http://www.oracle.com/ 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)