e preceding the exit or any return statement
   should be

      <b>chkout_c</b>  ( module );

   All CSPICE routines should call <a href="chkin_c.html">chkin_c</a> and <b>chkout_c</b>, unless they
   are classified as `error free'.  Programs linked with CSPICE
   may also use <a href="chkin_c.html">chkin_c</a> and <b>chkout_c</b>.

   Routines that don't call <a href="chkin_c.html">chkin_c</a> and <b>chkout_c</b> won't appear in the
   traceback.

   All routines that call <a href="chkin_c.html">chkin_c</a