def dw_WriteBoundData(fname, boundflow_labels):
    """ 
    writes B5\\_bounddata.inc
    """
    exfile = open(fname, 'w')
    print(';Written by dw_WriteBoundData', file=exfile)
    for i in boundflow_labels:
        print("ITEM '%s'" % i, file=exfile)
        print("CONCENTRATION  '%s' 'Check' 'Initial'" % i, file=exfile)
        print('DATA', file=exfile)
        print('1.0  1.0  0.0', file=exfile)
        print('', file=exfile)
    exfile.close()
