DPF: time scoping in non-linear plastic structural analysis

I am new to the pyANSYS framework. Using ANSYS 2023 R2.
I am running DPF in ANSYS Mechanical and post processing a structural non-linear plastic analysis with 200 substeps. I'm trying to scope my results in the time domain to the specific time that my max plasticity occurs.
I do this with the following function and it kind of works:
def define_dpf_workflow(analysis): import mech_dpf import Ans.DataProcessing as dpf dataSource = dpf.DataSources() dataSource.SetResultFilePath(r'E:\file.rst','rst') timeScoping = dpf.Scoping() timeScoping.Location = 'Time' timeScoping.Ids = [75] s1=dpf.operators.result.stress_principal_1() s1.inputs.time_scoping.Connect(timeScoping) s1.inputs.data_sources.Connect(dataSource) s1stress=s1.outputs.fields_container.GetData() dpf_workflow = dpf.Workflow() dpf_workflow.Add(s1) dpf_workflow.SetOutputContour(s1stress) dpf_workflow.Record('wf_id', True) this.WorkflowId = dpf_workflow.GetRecordedId()
But I am noticing some strange things.
- I have to use the Iron Python Engine. If I use the CPython engine I get the following error:
Error when invoking function 'post_started'.Traceback (most recent call last):
StandardError: Exception has been thrown by the target of an invocation.Traceback (most recent call last):
Exception: name 'this' is not defined
- The actual analysis time that the max pasticity occurs is 4 seconds but I have to put in 75 in order to specify the 4s time point even when I specify that op.Location = 'Time'
Does anyone know why I'm getting the "this" exception if I use CPython and how do I get the scoping to take actual time requests rather than substep numbers?