timum performance LDWORK should be larger.

</PRE>
<B>Error Indicator</B>
<PRE>
  INFO    INTEGER
          = 0:  successful exit;
          &lt; 0:  if INFO = -i, the i-th argument had an illegal
                value;
          = 1:  if the state matrices A and/or AV are not stable or
                not in a real Schur form;
          = 2:  if the state matrices A and/or AW are not stable or
                not in a real Schur form;
          = 3:  eigenvalues computation failure.

</PRE>
<A name="Method