Factor of Safety from Command Line

To perform a relibility based analysis of a 3D slope model, I have created a 3D FE-Model in Plaxis 3D and in the next step I would like to couple this with an external software that changes the soil parameters and starts the safty analysis in Plaxis. I now want to have the external program read out the safety factor and for that, I need the corresponding command line in Plaxis Output. Can anyone tell me how I can query the SumMsf via the command line in the Output as I can do for example for the total displacement? I cannot find a ResultTypes for the Calcuation Information, but maybe there is anouther Output Object for that.