ORA-01031: insufficient privileges
 *Cause: An attempt was made to change the current username or password
         without the appropriate privilege. This error also occurs if
         attempting to install a database without the necessary operating
         system privileges.
         When Trusted Oracle is configure in DBMS MAC, this error may occur
         if the user was granted the necessary privilege at a higher label
         than the current login.
 *Action: Ask the database administrator to perform the operation or grant
          the required privileges.
          For Trusted Oracle users getting this error although granted the
          the appropriate privilege at a higher label, ask the database
          administrator to regrant the privilege at the appropriate label.