[DPF] An unexpected error occurred - rst file used by another program

Hello, I'm writing some codes in DPF in a python result inside my modal analysis, so I need to read the rst file with the dataSource accessed with the "dpf.DataSources(analysis.ResultFileName)" command.

My code works well, but when I want to resolve my modal analysis, it shows this error :

An unexpected error occurred : ansys failed saving the rst file to the working directory path because rst file is used by another program.

I guess that ansys opened the rst file in the dpf to read some results, but the rst file is still opened and not close when we perform the solve. How can I somehow "close" the rst file at the end of my python result ?

Thanks for help,

Adrien

Find more posts tagged with

Python

PyAnsys

PyDPF

IronPython

DPF

Accepted answers

Aria

@Adrien Vet could you try releasing the file in this manner?

analysis1 = ExtAPI.DataModel.Project.Model.Analyses[0]
dataSource = dpf.DataSources(analysis1.Solution.ResultFilePath)
my_model = dpf.Model(analysis1.Solution.ResultFilePath)
my_model.ReleaseStreams()

All comments

Aria

You could try using "with" to access the RST:

with dpf.Model(Analysis.ResultFileName) as myDS:
    # code block...

If you use streams:

import mech_dpf
import Ans.DataProcessing as dpf
mech_dpf.setExtAPI


analysis = Model.Analyses[0]
dataSource = dpf.DataSources(analysis.Solution.ResultFilePath)
mech_dpf.setExtAPI(ExtAPI)
streams = mech_dpf.GetStreams(0)
def get_all_conta_elems(streams):
    op = dpf.operators.scoping.on_property(
                                property_name = "mapdl_element_type",
                                property_id = 174,
                                requested_location = "Elemental",
                                streams_container=streams)
    conta_elems = op.outputs.mesh_scoping.GetData().Ids
    return conta_elems

con_elem = get_all_conta_elems(streams)
streams.ReleaseHandles()

Adrien Vet

Thanks for your reply,

Unfortunately, when I try "with", it tells me this error :

Indeed, the dpf.Model(analysis.ResultFileName) has not attribute named "__exit__" to exit the file :

>>> print(dir(dpf.Model(analysis.ResultFileName)))
['AvailableNamedSelections', 'CreateOperator', 'DataSources', 'Equals', 'GetHashCode', 'GetNamedSelection', 'GetType', 'MemberwiseClone', 'Mesh', 'MeshProvider', 'ModelsResults', 'ReferenceEquals', 'ReleaseStreams', 'ResultFilePath', 'ResultInfo', 'ResultInfoProvider', 'SetResultFilePath', 'StreamsProvider', 'TimeFreqSupport', 'TimeFreqSupportProvider', 'ToString', '__class__', '__delattr__', '__doc__', '__format__', '__getattribute__', '__hash__', '__init__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', 'results']

Aria

@Adrien Vet could you try releasing the file in this manner?

analysis1 = ExtAPI.DataModel.Project.Model.Analyses[0]
dataSource = dpf.DataSources(analysis1.Solution.ResultFilePath)
my_model = dpf.Model(analysis1.Solution.ResultFilePath)
my_model.ReleaseStreams()

Adrien Vet

The code lines you propose seem to solve my problem.

Thank you !