title: Oracle PL/SQL: ORA-06502 error when assigning a string to a raw variable
body: <p>I try to load some textinformation into clob fields. I reduced the code I'm having trouble to the following snippet:</p>
  
  <pre><code>DECLARE
      WS_MAIN_CHUNK RAW(12001);
  BEGIN
      WS_MAIN_CHUNK := 'Do';
  END;
  /
  </code></pre>
  
  <p>It gives me the error <em>ORA-06512 PL/SQL: numeric or value error: hex to raw conversion error</em>. Why is the string 'Do' a hex value and how can I fix it -> Just assign the string to the raw variable?</p>
  
  <p>Thx for your help</p>