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MATLAB 2018b readtable error after update

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Have a script using
to read from a .csv file.
Worked fine before a MATLAB update but now no matter how I use readtable, I get this error:
Error using readtable (line 216)
An error occurred while trying to determine whether "readData" is a function name.
How can I fix this? Thanks


Annette Hynes
Annette Hynes on 4 Feb 2019
I got a different error when using:
Error using readtable (line 216)
Delimiter must be a string array, character vector, or cell array of character vectors.
Note: readtable detected the following parameters:
'Delimiter', ',', 'HeaderLines', , 'ReadVariableNames', true, 'Format', ''
I also uninstalled and reinstalled R2018b, and 'readtable' seems to be working now.

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Accepted Answer

Christina Chu
Christina Chu on 25 Jan 2019
Thanks all for the suggestions. I reinstalled MATLAB 2018b today and that fixed the problem. Going to stay away from the update button.

  1 Comment

Stephan on 28 Jan 2019
i dont rhink this is a good idea. maybe things went wrong, but in general i would recommend to update.

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More Answers (1)

Jeremy Hughes
Jeremy Hughes on 24 Jan 2019
This is an installation issue. Although this might not resolve the issue try
>> restoredefaultpath
>> rehash toolboxcache
You can check
>> which readData -all
The correct version for readtable is ...matlab/toolbox/shared/io/+matlab/+io/+internal/+text/TableParser.m
If there's something else, then try temporarily renaming the others or removing their folders from the path.
If this still doesn't work you might need help from tech support.


Christina Chu
Christina Chu on 25 Jan 2019
Thanks for the suggestion. Sadly it didn't work.
jonathan preussner
jonathan preussner on 30 May 2019
I had a readtable error involving " too many arguments" and this worked for me
NICOLE MIN on 19 May 2020
I had this issue, please help. ive tried all the possible solution but no avail .

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