PLS Database Error Messages PLS-01913: instance must be of type ‘string’ or one of its subtypes May 7, 2021 mpbod PLS-01913: instance must be of type 'string' or one of its subtypes Cause: The run-time type of the instance is the not declared type or one of its subtypes. That is, TREAT(supertype AS subtype) fails. Action: Catch the exception. 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)