Problems whith trying to use two different instances of mapdl in the new version of ansys-mapdl-core

[Clauperezma]

🤓 Before submitting the issue

• I have visited the Troubleshooting section.
• I have searched among the existing issues.
• I am using a Python virtual environment.
• I am using the latest version of PyMAPDL and its dependencies (fully updated virtual environment). You can update them using pip install --upgrade --upgrade-strategy eager ansys-mapdl-core in your activated virtual environment.

🔍 Description of the bug

I just updated the las version of ansys-mapdl-core to ansys-mapdl-core 0.68.1. But now there is this error when I´m trying to open two instances of mapdl, like this:

>>> from ansys.mapdl.core import launch_mapdl
>>> mapdl =launch_mapdl(additional_switches='-smp',mode="grpc")
>>> mapdl.mute = True
>>> 
>>> mapdl2 = launch_mapdl(additional_switches='-smp',mode="grpc")
>>> mapdl2.mute = True
PortAlreadyInUseByAnMAPDLInstance: The port 50052 is already used by an MAPDL instance.

This lines worked fine for previous versions and I could establish different geometries, but now I get that error.

I will like to know how can I handle this two instances correctly in this new version and I will also need a 3 in the future. So how can I open 3 different instances in mapdl to work with 3 different geometries at the same time?. Thank you very much!

🕵️ Steps To Reproduce

from ansys.mapdl.core import launch_mapdl
mapdl =launch_mapdl(additional_switches='-smp',mode="grpc")
mapdl.mute = True

mapdl2 = launch_mapdl(additional_switches='-smp',mode="grpc")
mapdl2.mute = True

💻 Which Operating System are you using?

Windows

🐍 Which Python version are you using?

3.11

💾 Which MAPDL version are you using?

ansys-mapdl-core 0.68.1

📝 PyMAPDL Report

Show the Report!

PyMAPDL Software and Environment Report


Packages Requirements
*********************

Core packages
-------------
ansys.mapdl.core    : 0.68.1
numpy               : 1.26.4
platformdirs        : 4.2.0
scipy               : 1.13.0
grpc                : Package not found
ansys.api.mapdl.v0  : Package not found
ansys.mapdl.reader  : 0.53.0
google.protobuf     : Package not found

Optional packages
-----------------
matplotlib          : 3.8.4
pyvista             : 0.43.5
pyiges              : 0.3.1
tqdm                : 4.66.2


Ansys Installation
******************
Version   Location
------------------
222       C:\Program Files\ANSYS Inc\v222


Ansys Environment Variables
***************************
ANSYS222_DIR                   C:\Program Files\ANSYS Inc\v222\ANSYS
ANSYSLIC_DIR                   C:\Program Files\ANSYS Inc\Shared Files\Licensing
ANSYS_SYSDIR                   winx64
ANSYS_SYSDIR32                 win32
AWP_ROOT222                    C:\Program Files\ANSYS Inc\v222
CADOE_LIBDIR222                C:\Program Files\ANSYS Inc\v222\CommonFiles\Language\en-us

📝 Installed packages

Show the installed packages!

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numpy @ file:///C:/b/abs_c1ywpu18ar/croot/numpy_and_numpy_base_1708638681471/work/dist/numpy-1.26.4-cp311-cp311-win_amd64.whl#sha256=5dfd3e04dc1c2826d3f404fdc7f93c097901f5da9b91f4f394f79d4e038ed81d
numpydoc @ file:///C:/ci_311/numpydoc_1676453412027/work
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overrides @ file:///C:/b/abs_cfh89c8yf4/croot/overrides_1699371165349/work
packaging==24.0
pandas @ file:///C:/b/abs_fej9bi0gew/croot/pandas_1702318041921/work/dist/pandas-2.1.4-cp311-cp311-win_amd64.whl#sha256=d3609b7cc3e3c4d99ad640a4b8e710ba93ccf967ab8e5245b91033e0200f9286
pandocfilters @ file:///opt/conda/conda-bld/pandocfilters_1643405455980/work
panel @ file:///C:/b/abs_abnm_ot327/croot/panel_1706539613212/work
param @ file:///C:/b/abs_39ncjvb7lu/croot/param_1705937833389/work
paramiko @ file:///opt/conda/conda-bld/paramiko_1640109032755/work
parsel @ file:///C:/b/abs_ebc3tzm_c4/croot/parsel_1707503517596/work
parso @ file:///opt/conda/conda-bld/parso_1641458642106/work
partd @ file:///C:/b/abs_46awex0fd7/croot/partd_1698702622970/work
pathlib @ file:///Users/ktietz/demo/mc3/conda-bld/pathlib_1629713961906/work
pathspec @ file:///C:/ci_311/pathspec_1679427644142/work
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pexpect @ file:///tmp/build/80754af9/pexpect_1605563209008/work
pickleshare @ file:///tmp/build/80754af9/pickleshare_1606932040724/work
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Pint==0.23
pkce @ file:///C:/b/abs_d0z4444tb0/croot/pkce_1690384879799/work
pkginfo @ file:///C:/b/abs_d18srtr68x/croot/pkginfo_1679431192239/work
platformdirs==4.2.0
plotly==5.20.0
pluggy @ file:///C:/ci_311/pluggy_1676422178143/work
plumbum==1.8.2
ply==3.11
pooch==1.8.1
prometheus-client @ file:///C:/ci_311/prometheus_client_1679591942558/work
prompt-toolkit @ file:///C:/b/abs_68uwr58ed1/croot/prompt-toolkit_1704404394082/work
Protego @ file:///tmp/build/80754af9/protego_1598657180827/work
proto-plus==1.23.0
protobuf==3.20.3
psutil==5.9.8
ptyprocess @ file:///tmp/build/80754af9/ptyprocess_1609355006118/work/dist/ptyprocess-0.7.0-py2.py3-none-any.whl
pure-eval @ file:///opt/conda/conda-bld/pure_eval_1646925070566/work
py-cpuinfo @ file:///C:/b/abs_9ej7u6shci/croot/py-cpuinfo_1698068121579/work
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pyansys==2024.1.7
pyansys-tools-versioning==0.5.0
pyarrow @ file:///C:/b/abs_93i_y2dub4/croot/pyarrow_1707330894046/work/python
pyasn1 @ file:///Users/ktietz/demo/mc3/conda-bld/pyasn1_1629708007385/work
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pycosat @ file:///C:/b/abs_31zywn1be3/croot/pycosat_1696537126223/work
pycparser @ file:///tmp/build/80754af9/pycparser_1636541352034/work
pyct @ file:///C:/ci_311/pyct_1676438538057/work
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pydantic==2.6.4
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pydeck @ file:///C:/b/abs_ad9p880wi1/croot/pydeck_1706194121328/work
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pyerfa @ file:///C:/ci_311/pyerfa_1676503994641/work
pyflakes @ file:///C:/ci_311/pyflakes_1678402101687/work
Pygments @ file:///C:/b/abs_fay9dpq4n_/croot/pygments_1684279990574/work
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pyiges==0.3.1
PyJWT @ file:///C:/ci_311/pyjwt_1676438890509/work
pylint @ file:///C:/ci_311/pylint_1678740302984/work
pylint-venv @ file:///C:/ci_311/pylint-venv_1678402170638/work
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PyNaCl @ file:///C:/ci_311/pynacl_1676445861112/work
pyodbc @ file:///C:/b/abs_90kly0uuwz/croot/pyodbc_1705431396548/work
pyOpenSSL @ file:///C:/b/abs_baj0aupznq/croot/pyopenssl_1708380486701/work
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PyQt5-sip @ file:///C:/b/abs_c0pi2mimq3/croot/pyqt-split_1698769125270/work/pyqt_sip
PyQtWebEngine==5.15.6
Pyro5==5.15
PySocks @ file:///C:/ci_311/pysocks_1676425991111/work
pyspnego==0.10.2
pytest @ file:///C:/b/abs_48heoo_k8y/croot/pytest_1690475385915/work
python-dateutil==2.9.0.post0
python-dotenv @ file:///C:/ci_311/python-dotenv_1676455170580/work
python-jose==3.3.0
python-json-logger @ file:///C:/b/abs_cblnsm6puj/croot/python-json-logger_1683824130469/work
python-keycloak==2.0.0
python-lsp-black @ file:///C:/ci_311/python-lsp-black_1678721855627/work
python-lsp-jsonrpc==1.0.0
python-lsp-server @ file:///C:/b/abs_catecj7fv1/croot/python-lsp-server_1681930405912/work
python-slugify @ file:///tmp/build/80754af9/python-slugify_1620405669636/work
python-snappy @ file:///C:/ci_311/python-snappy_1676446060182/work
pytoolconfig @ file:///C:/b/abs_f2j_xsvrpn/croot/pytoolconfig_1701728751207/work
pytwin==0.6.0
pytz @ file:///C:/b/abs_19q3ljkez4/croot/pytz_1695131651401/work
pyvista==0.43.5
pyviz_comms @ file:///C:/b/abs_31r9afnand/croot/pyviz_comms_1701728067143/work
pywavelets @ file:///C:/b/abs_7est386xsb/croot/pywavelets_1705049855879/work
pywin32==305.1
pywin32-ctypes @ file:///C:/ci_311/pywin32-ctypes_1676427747089/work
pywinpty @ file:///C:/ci_311/pywinpty_1677707791185/work/target/wheels/pywinpty-2.0.10-cp311-none-win_amd64.whl
PyYAML @ file:///C:/b/abs_782o3mbw7z/croot/pyyaml_1698096085010/work
pyzmq @ file:///C:/b/abs_89aq69t0up/croot/pyzmq_1705605705281/work
QDarkStyle @ file:///tmp/build/80754af9/qdarkstyle_1617386714626/work
qstylizer @ file:///C:/ci_311/qstylizer_1678502012152/work/dist/qstylizer-0.2.2-py2.py3-none-any.whl
QtAwesome @ file:///C:/ci_311/qtawesome_1678402331535/work
qtconsole @ file:///C:/b/abs_eb4u9jg07y/croot/qtconsole_1681402843494/work
QtPy @ file:///C:/b/abs_derqu__3p8/croot/qtpy_1700144907661/work
queuelib @ file:///C:/b/abs_563lpxcne9/croot/queuelib_1696951148213/work
readme_renderer==43.0
referencing @ file:///C:/b/abs_09f4hj6adf/croot/referencing_1699012097448/work
regex @ file:///C:/b/abs_d5e2e5uqmr/croot/regex_1696515472506/work
requests @ file:///C:/b/abs_474vaa3x9e/croot/requests_1707355619957/work
requests-file @ file:///Users/ktietz/demo/mc3/conda-bld/requests-file_1629455781986/work
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requests-ntlm==1.2.0
requests-toolbelt @ file:///C:/b/abs_2fsmts66wp/croot/requests-toolbelt_1690874051210/work
rfc3339-validator @ file:///C:/b/abs_ddfmseb_vm/croot/rfc3339-validator_1683077054906/work
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rich @ file:///C:/b/abs_09j2g5qnu8/croot/rich_1684282185530/work
rope @ file:///C:/ci_311/rope_1678402524346/work
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rsa==4.9
Rtree @ file:///C:/ci_311/rtree_1676455758391/work
ruamel-yaml-conda @ file:///C:/ci_311/ruamel_yaml_1676455799258/work
ruamel.yaml @ file:///C:/ci_311/ruamel.yaml_1676439214109/work
s3fs @ file:///C:/b/abs_24vbfcawyu/croot/s3fs_1701294224436/work
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scikit-learn @ file:///C:/b/abs_38k7ridbgr/croot/scikit-learn_1684954723009/work
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Sphinx @ file:///C:/ci_311/sphinx_1676434546244/work
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sphinxcontrib-devhelp @ file:///home/ktietz/src/ci/sphinxcontrib-devhelp_1611920923094/work
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sphinxcontrib-qthelp @ file:///home/ktietz/src/ci/sphinxcontrib-qthelp_1611921055322/work
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spyder @ file:///C:/b/abs_e99kl7d8t0/croot/spyder_1681934304813/work
spyder-kernels @ file:///C:/b/abs_e788a8_4y9/croot/spyder-kernels_1691599588437/work
SQLAlchemy @ file:///C:/b/abs_876dxwqqu8/croot/sqlalchemy_1705089154696/work
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sspilib==0.1.0
stack-data @ file:///opt/conda/conda-bld/stack_data_1646927590127/work
statsmodels @ file:///C:/b/abs_7bth810rna/croot/statsmodels_1689937298619/work
streamlit @ file:///C:/b/abs_ba5je7xxy7/croot/streamlit_1706200559831/work
sympy @ file:///C:/b/abs_82njkonm7f/croot/sympy_1701397685028/work
tables @ file:///C:/b/abs_411740ajo7/croot/pytables_1705614883108/work
tabulate @ file:///C:/b/abs_21rf8iibnh/croot/tabulate_1701354830521/work
tblib @ file:///Users/ktietz/demo/mc3/conda-bld/tblib_1629402031467/work
tenacity @ file:///C:/b/abs_ddkoa9nju6/croot/tenacity_1682972298929/work
terminado @ file:///C:/ci_311/terminado_1678228513830/work
text-unidecode @ file:///Users/ktietz/demo/mc3/conda-bld/text-unidecode_1629401354553/work
textdistance @ file:///tmp/build/80754af9/textdistance_1612461398012/work
threadpoolctl @ file:///Users/ktietz/demo/mc3/conda-bld/threadpoolctl_1629802263681/work
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tldextract @ file:///opt/conda/conda-bld/tldextract_1646638314385/work
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tomli==2.0.1
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toolz @ file:///C:/ci_311/toolz_1676431406517/work
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traitlets @ file:///C:/ci_311/traitlets_1676423290727/work
truststore @ file:///C:/b/abs_55z7b3r045/croot/truststore_1695245455435/work
twine==5.0.0
Twisted @ file:///C:/b/abs_e7yqd811in/croot/twisted_1708702883769/work
twisted-iocpsupport @ file:///C:/ci_311/twisted-iocpsupport_1676447612160/work
typing_extensions @ file:///C:/b/abs_72cdotwc_6/croot/typing_extensions_1705599364138/work
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uc-micro-py @ file:///C:/ci_311/uc-micro-py_1676457695423/work
ujson @ file:///C:/ci_311/ujson_1676434714224/work
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watchdog @ file:///C:/ci_311/watchdog_1676457923624/work
wcwidth @ file:///Users/ktietz/demo/mc3/conda-bld/wcwidth_1629357192024/work
webencodings==0.5.1
websocket-client @ file:///C:/ci_311/websocket-client_1676426063281/work
Werkzeug @ file:///C:/b/abs_8578rs2ra_/croot/werkzeug_1679489759009/work
whatthepatch @ file:///C:/ci_311/whatthepatch_1678402578113/work
widgetsnbextension @ file:///C:/b/abs_derxhz1biv/croot/widgetsnbextension_1701273671518/work
win-inet-pton @ file:///C:/ci_311/win_inet_pton_1676425458225/work
wrapt @ file:///C:/ci_311/wrapt_1676432805090/work
xarray @ file:///C:/b/abs_5bkjiynp4e/croot/xarray_1689041498548/work
xlwings @ file:///C:/ci_311_rebuilds/xlwings_1679013429160/work
xmlschema==2.5.1
xyzservices @ file:///C:/ci_311/xyzservices_1676434829315/work
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yarl @ file:///C:/b/abs_8bxwdyhjvp/croot/yarl_1701105248152/work
zict @ file:///C:/b/abs_780gyydtbp/croot/zict_1695832899404/work
zipp==3.18.1
zope.interface @ file:///C:/ci_311/zope.interface_1676439868776/work
zstandard==0.19.0

📝 Logger output file

Show the logger output file.

# PASTE HERE THE CONTENT OF THE LOGGER OUTPUT FILE.

[mikerife]

Hi @Clauperezma
By default PyMAPDL is using port 50052 to communicate with the MAPDL aaS instance launched. So there is a port conflict opening two instances using the same port. Just change the port number; for example:

from ansys.mapdl.core import launch_mapdl
mapdl =launch_mapdl(port=50052, additional_switches='-smp',mode="grpc")
mapdl.mute = True

mapdl2 = launch_mapdl(port=50053, additional_switches='-smp',mode="grpc")
mapdl2.mute = True

Now depending on how you want to interact the MAPDL aaS and/or the format of the PyMAPDL script you may want to use a Pool of instances instead of manually opening multiple instances. See here

Mike

[germa89]

thank you a lot for your answer @mikerife.

@Clauperezma I'm closing this issue. Feel free to reopen it if you still have problems with this.