DATA_FILES is a directory object that contains the DETAILS.TXT text file.
You have the required permissions to access the directory object.
You create a table using the following command:
CREATE TABLE clob_tab(col2 CLOB);
View the Exhibit and examine the PL/SQL block that you execute for loading the external text file
into the table that currently has no rows. The PL/SQL block results in an error.

What correction must be done to ensure the PL/SQL block executes successfully?