Unable to use 'readmatrix' function on Matlab R2022b on Ubuntu Linux

Hi,

i wrote some code that in the first line read data from a csv and the process it.

I tested the code under window with Matlab R2022b and it's fine, it works as expected.

Using it on linux return this error:

% WITHOUT A PATH

>> readmatrix()

Error using readmatrix

Invalid default value for property 'Options' in class 'matlab.io.internal.functions.AcceptsImportOptions':

Error: File: ImportOptions.m Line: 731 Column: 20

Unable to find or import 'matlab.io.internal.common.display.cellArrayDisp'. Imported names must end with '.*' or be fully qualified.

% WITH A CORRECT PATH

path = strcat('src\Calibration\MagneticSesonsors\MagneticSensorsCSV\BigSensorsCSV\Calibration\MagneticAndUWB\WA0000',num2str(2),".CSV")

path =

"src\Calibration\MagneticSesonsors\MagneticSensorsCSV\BigSensorsCSV\Calibration\MagneticAndUWB\WA00002.CSV"

>> readmatrix(path);

Error using readmatrix

Invalid default value for property 'Options' in class 'matlab.io.internal.functions.AcceptsImportOptions':

Error: File: ImportOptions.m Line: 731 Column: 20

Unable to find or import 'matlab.io.internal.common.display.cellArrayDisp'. Imported names must end with '.*' or be fully qualified.

both with a correct string path argument that without it.

It is a problem of my installation? i've already update to the last release and already try to reinstall Matlab. Can anyone help me to understand and fix it?

NOTE: The .csv files are not open during the commands execution.

Answer 1

[Brandon Stevens]

Unfortauntely Valerio I haven't been able to reproduce this issue. I am able to use the readmatrix() function on a (.csv) file referenced by a path on a Linux OS (Ubuntu 20.04.5 LTS). So I think there may be an issue with how MATLAB is installed/setup.

Since you already re-installed MATLAB, I would try restoring your MATLAB path to the default. This can help uncover if there is a path issue, shadowing issue or possibly a corrupt installation. Note that running these commands will remove any custom paths you have made, so look at this other post for some information on how to back them up: https://www.mathworks.com/matlabcentral/answers/166871-how-will-running-the-restoredefaultpath-and-savepath-commands-affect-my-custom-paths-and-how-do

Try these in your MATLAB Command Window (after making a backup if you have a custom path!):

>>restoredefaultpath
>>rehash toolboxcache
>>savepath

If you are still experiencing issues, I'd then recommend contacting MathWorks Technical Support

[Valerio Brunacci]

UPDATE: after io reinstall again MATLAB, i notice that at the startup in the command Window there are a lot of warnings:

Warning: Name is nonexistent or not a directory: /usr/local/MATLAB/R2022b/toolbox/matlab/helptools/docsearch_server

Warning: Name is nonexistent or not a directory: /usr/local/MATLAB/R2022b/toolbox/matlab/parquetio

Warning: Name is nonexistent or not a directory: /usr/local/MATLAB/R2022b/toolbox/matlab/appcontainer/appcontainer

Warning: Name is nonexistent or not a directory: /usr/local/MATLAB/R2022b/toolbox/matlab/parquetds

Warning: Name is nonexistent or not a directory: /usr/local/MATLAB/R2022b/toolbox/simulink/mask/iconeditor

Warning: Name is nonexistent or not a directory: /usr/local/MATLAB/R2022b/toolbox/simulink/vmgr/datamodel/web/UI

Warning: Name is nonexistent or not a directory: /usr/local/MATLAB/R2022b/toolbox/simulink/slhistory

Warning: Name is nonexistent or not a directory: /usr/local/MATLAB/R2022b/toolbox/simulink/vmgr/plugin/m

Warning: Name is nonexistent or not a directory: /usr/local/MATLAB/R2022b/toolbox/rtw/targets/common/can/blocks/tlc_c

Warning: Name is nonexistent or not a directory: /usr/local/MATLAB/R2022b/toolbox/visionhdl/visionhdlexamples

Warning: Name is nonexistent or not a directory: /usr/local/MATLAB/R2022b/toolbox/aeroblks/aeroblks/hmi

Warning: Name is nonexistent or not a directory: /usr/local/MATLAB/R2022b/toolbox/globaloptim/globaloptimdemos

Warning: Name is nonexistent or not a directory: /usr/local/MATLAB/R2022b/ui/mw-webwindow/mw-webwindow-m

Warning: Name is nonexistent or not a directory: /usr/local/MATLAB/R2022b/toolbox/fuzzy/fuzdemos

Warning: Name is nonexistent or not a directory: /usr/local/MATLAB/R2022b/toolbox/optim/optimdemos

Warning: Name is nonexistent or not a directory: /usr/local/MATLAB/R2022b/toolbox/shared/cmlink/view/util/m

Warning: Name is nonexistent or not a directory: /usr/local/MATLAB/R2022b/toolbox/soc/shared/peripherals

Warning: Name is nonexistent or not a directory: /usr/local/MATLAB/R2022b/toolbox/robust/rctdemos

Warning: Name is nonexistent or not a directory: /usr/local/MATLAB/R2022b/toolbox/instrument/preferences

Warning: Name is nonexistent or not a directory: /usr/local/MATLAB/R2022b/toolbox/images/imdemos

Warning: Name is nonexistent or not a directory: /usr/local/MATLAB/R2022b/toolbox/symbolic/symbolicdemos

Warning: Name is nonexistent or not a directory: /usr/local/MATLAB/R2022b/toolbox/comparisons/mldesktop/action_ui/matlab

Warning: Name is nonexistent or not a directory: /usr/local/MATLAB/R2022b/toolbox/shared/slvnv

Warning: Name is nonexistent or not a directory: /usr/local/MATLAB/R2022b/toolbox/curvefit/sftoolgui

Warning: Name is nonexistent or not a directory: /usr/local/MATLAB/R2022b/toolbox/shared/testconsole

Warning: Name is nonexistent or not a directory: /usr/local/MATLAB/R2022b/toolbox/sl_dictionary/editor

Warning: Name is nonexistent or not a directory: /usr/local/MATLAB/R2022b/toolbox/sl_dictionary/core/api

Maybe is this the problem?

[Brandon Stevens]

I agree that this is indicating some issues with the installation of MATLAB. I would recommend reaching out to our support to take a look at how to resolve the installation issues you are experiencing.

https://www.mathworks.com/support/contact_us.html