not referenced if ABSCHU = 'S',
          ULA = 'U', and ULB = 'U'.

  LDWORK  INTEGER
          The length of the array DWORK.
          LDWORK = 0, if ABSCHU = 'S', ULA = 'U', and ULB = 'U';
          LDWORK = 2*MAX(M,N)*(4 + 2*MAX(M,N)), otherwise.

</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 a (numerically) singular matrix T was encountered
              