关于arcpy创建克里金插值批处理工具，求指导

import arcpy

from arcpy import env

from arcpy.sa import *

import os



env.workspace=arcpy.GetParameter(0)



out_workspace=arcpy.GetParameter(1)



out_cell_value=arcpy.GetParameter(2)

kModelOrdinary=KrigingModelOrdinary("CIRCULAR",out_cell_value,2.6,542,0)

fcs=arcpy.ListFeatureClasses("*","point")

for fc in fcs:

output=os.path.join(out_workspace,fc)//这个地方出错

out_Kriging=arcpy.sa.Kriging(fc,"on2",kModelOrdinary,out_cell_value, RadiusFixed(20000, 1)," ")

out_Kriging.save(output)//最后这么写为啥不对呢