利用abaqus RSG制作运行脚本的小插件

我想利用abaqus的RSG编写一个运行脚本的小插件，先在abaqus GUI界面操作，运行脚本，从.rpy文件中复制代码，编入Kernel函数，如下：

# -*- coding: mbcs -*-
#
# Abaqus/CAE Release 2017 replay file
# Internal Version: 2016_09_28-05.54.59 126836
# Run by DELL on Fri Nov 26 10:17:26 2021
#

# from driverUtils import executeOnCaeGraphicsStartup
# executeOnCaeGraphicsStartup()
#: Executing "onCaeGraphicsStartup()" in the site directory ...
from abaqus import *
from abaqusConstants import *
session.Viewport(name='Viewport: 1', origin=(0.0, 0.0), width=199.546875, 
    height=132.252319335938)
session.viewports['Viewport: 1'].makeCurrent()
session.viewports['Viewport: 1'].maximize()
from caeModules import *
from driverUtils import executeOnCaeStartup
executeOnCaeStartup()
session.viewports['Viewport: 1'].partDisplay.geometryOptions.setValues(
    referenceRepresentation=ON)
execfile('F:/F DELL Downloads/abaqus/Crack-Propagation-master/main.py', 
    __main__.__dict__)

我自己定义一个函数，def auto_scaling(filename):，代码如下：

from abaqus import *
from abaqusConstants import *
def auto_scaling(filename):
    # -*- coding: mbcs -*-
    #
    # Abaqus/CAE Release 2017 replay file
    # Internal Version: 2016_09_28-05.54.59 126836
    # Run by DELL on Wed Nov 24 20:18:25 2021
    #

    # from driverUtils import executeOnCaeGraphicsStartup
    # executeOnCaeGraphicsStartup()
    #: Executing "onCaeGraphicsStartup()" in the site directory ...
    session.Viewport(name='Viewport: 1', origin=(0.0, 0.0), width=199.546875, height=132.252319335938)
    session.viewports['Viewport: 1'].makeCurrent()
    session.viewports['Viewport: 1'].maximize()
    from caeModules import *
    from driverUtils import executeOnCaeStartup
    executeOnCaeStartup()
    session.viewports['Viewport: 1'].partDisplay.geometryOptions.setValues(
        referenceRepresentation=ON)
    execfile(filename, 
        __main__.__dict__)

然后下面是RSG操作：

出现了name 'main' is not defined的错误，为什么啊？求解答