#define iRel_Instance integer

      integer iRel_IBASE_IFACE
      integer iRel_IGEOM_IFACE
      integer iRel_IMESH_IFACE
      integer iRel_IREL_IFACE
      integer iRel_IFIELD_IFACE

      parameter (iRel_IBASE_IFACE = 0)
      parameter (iRel_IGEOM_IFACE = 1)
      parameter (iRel_IMESH_IFACE = 2)
      parameter (iRel_IREL__IFACE = 3)
      parameter (iRel_IFIELD_IFACE = 4)