TheMFE=TheSystem.MFE
TheMFE.GetOperandAt(1).Value
But I got error message:
AttributeError: '<win32com.gen_py.ZOSAPI_Interfaces.IMFERow instance at 0x1627391037392>' object has no attribute 'Value'
l confirmed that the Property 'Value' exits when I checked ZOS-API Syntax Help:
![](https://uploads-us-west-2.insided.com/zemax-en/attachment/200319-232812-value.jpg)
I also want to config DataType setting as StrehlRation for RMSField analysis, but I cannot make the enumeration correct with python.
![](https://uploads-us-west-2.insided.com/zemax-en/attachment/200319-234339-datatype.jpg)