 the inverse, or
   `push' operation.

   Every routine that participates in the traceback scheme should
   have a call to <a href="chkin_c.html">chkin_c</a> as the second executable statement.
   The first executable statements should be:

      if ( <a href="return_c.html">return_c</a>() )
         {
         return;
         }
      else
         {
         <a href="chkin_c.html">chkin_c</a> ( module );
         }


   Here module is the name of the routine in which this code appears.

   The line of cod