export_field_file only have 0 time data

[climaxburden]

In the case of other time data are selected to save, pyaedt export_field_file can only export time 0 data, but can not export other time data.

        success = maxwell_2d.post.export_field_file(

    quantity="Mag_H",
    solution="Setup1 : Transient",
    variations=None,
    output_file=fld_file,
    assignment="AllObjects",
    objects_type="Vol",
    intrinsics={"Time": "0ms"},
    phase=None,
    sample_points_file=None,
    sample_points=None,
    export_with_sample_points=True,
    reference_coordinate_system="Global",
    export_in_si_system=True,
    export_field_in_reference=True,
)

Error：
PyAEDT INFO: PostProcessor class has been initialized! Elapsed time: 0m 0sec

PyAEDT INFO: PostProcessor class has been initialized! Elapsed time: 0m 0sec
PyAEDT INFO: Post class has been initialized! Elapsed time: 0m 0sec
PyAEDT INFO: Exporting 'Mag_H' field. Please be patient.
PyAEDT ERROR: **************************************************************
PyAEDT ERROR: File "E:\PycharmProject\JQXXProject\pro1\main.py", line 133, in
PyAEDT ERROR: success = maxwell_2d.post.export_field_file(
PyAEDT ERROR: AEDT API Error on export_field_file
PyAEDT ERROR: Last Electronics Desktop Message - [error] script macro error: error in performing operation. (05:11:39 pm jul 17, 2025)

PyAEDT ERROR: Method arguments:
PyAEDT ERROR: quantity = Mag_H
PyAEDT ERROR: solution = Setup1 : Transient
PyAEDT ERROR: output_file = E:\AnsysFile\Electromagnetism\Maxwell\2025_10WMD3000SDDPMSG\01215156666.fld
PyAEDT ERROR: assignment = AllObjects
PyAEDT ERROR: objects_type = Vol
PyAEDT ERROR: intrinsics = {'Time': '1ms'}
PyAEDT ERROR: export_with_sample_points = True
PyAEDT ERROR: reference_coordinate_system = Global
PyAEDT ERROR: export_in_si_system = True
PyAEDT ERROR: export_field_in_reference = True
PyAEDT ERROR: **************************************************************

[gmalinve]

Hi @climaxburden,

It's difficult to say what's your problem without seeing the AEDT file and your whole code snippet.
Are you sure your solution is correctly analyzed?
Have you looked at this examples in PyAEDT library of examples? https://examples.aedt.docs.pyansys.com/version/dev/examples/low_frequency/general/field_export.html this does exactly what you are trying to do + it also calculates the field solution for each time step (retrieved with the get_solution_data).

Hope this helps,

KR

Giulia