&gt; 0.
          For optimum performance LDWORK should be larger.

  BWORK   LOGICAL array, dimension 2*N

</PRE>
<B>Warning Indicator</B>
<PRE>
  IWARN   INTEGER
          = 0:  no warning;
          = 1:  with ORDSEL = 'F', the selected order NR is greater
                than NSMIN, the sum of the order of the
                ALPHA-unstable part and the order of a minimal
                realization of the ALPHA-stable part of the given
                system; in this case, the resulting NR is set equal