ORA Database Error Messages ORA-29557: Java system class string cannot be modified August 23, 2017 mpbod ORA-29557: Java system class string cannot be modified Cause: A command was attempted that would have modified a Java system class Action: No action required 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)