accuracy of the computed eigenvalues and/or
  eigenvectors in the generalized eigenvalue problem
  A*x = lambda*B*x.

  This routine may optionally improve the conditioning of the
  scaling transformation compared to the LAPACK routine DGGBAL.

</PRE>
<A name="Specification"><B><FONT SIZE="+1">Specification</FONT></B></A>
<PRE>
      SUBROUTINE MB04DL( JOB, N, THRESH, A, LDA, B, LDB, ILO, IHI,
     $                   LSCALE, RSCALE, DWORK, IWARN, INFO )
C     .. Scalar Arguments ..
      CHARACTER         