************************************************************************
* This file is part of OpenMolcas.                                     *
*                                                                      *
* OpenMolcas is free software; you can redistribute it and/or modify   *
* it under the terms of the GNU Lesser General Public License, v. 2.1. *
* OpenMolcas is distributed in the hope that it will be useful, but it *
* is provided "as is" and without any express or implied warranties.   *
* For more details see the full text of the license in the file        *
* LICENSE or in <http://www.gnu.org/licenses/>.                        *
*                                                                      *
* Copyright (C) 1996-2006, T. Thorsteinsson and D. L. Cooper           *
************************************************************************
      subroutine loop_cvb(nel,nk,nkmin,nkmax,*)
      dimension nk(0:nel),nkmin(0:nel),nkmax(0:nel)

      do 1100 iel=1,nel-1
      ik=nk(iel)
c Tests: (1) IK+1 OCCUPIED; (2) IK NOT OCCUPIED; (3) IK MINIMAL
      if(.not.(nk(iel+1)-ik .eq.1 .or.
     >   ik.eq.nk(iel-1) .or. ik.eq.nkmin(iel)))goto 1200
1100  continue
c Maximize the loop on exit
      call imove_cvb(nkmax,nk,nel)
      return
c
c SITUATION IS :  IEL       \     <= NOT MINIMAL
c                 IEL+1     |
1200  nk(iel)=ik-1
      do 1300 jel=1,iel-1
1300  nk(jel)=min(nkmax(jel),ik-1)
      return 1
      end
