title: error when use Sql Navigator
body: <p>I have error when using tool Sql Navigator 6.2.1:
  I run command in Sql Navigator it alert error: "ORA-01031: insufficient privileges
  ORA-06512: at "SYS.DBMS_UTILITY", line 140
  ORA-06512: at line 6"</p>
  
  <pre><code>desc com.zsdddept;
  </code></pre>
  
  <p>com.zsdddept is table
  and when i run select command its no error and click table name show properties of table in Sql Navigator no action.</p>
  
  <p>But i run above command in Oracle Sql developer (same user) result no error and show description fields.</p>
  
  <p>What's the reason?</p>
  
  <p>Thanks</p>