Warning Message "unable to write to Excel format"

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Rita Sciuto
Rita Sciuto el 3 de Jul. de 2019
Comentada: Walter Roberson el 8 de Feb. de 2020
I'm solving a problem with variational inequality. I have a code but after 6 iteractions Matlab blocks and gives me this Warning:
Unable to write to Excel format, attempting to write file to csv format. To write to an
Excel file, convert your data to a table and use writetable.
What's the meaning?
  2 comentarios
KALYAN ACHARJYA
KALYAN ACHARJYA el 3 de Jul. de 2019
It would be helpful to answer, if you share the code or representational code?
Rita Sciuto
Rita Sciuto el 3 de Jul. de 2019
I sent you a message

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Respuestas (1)

Jiajia
Jiajia el 8 de Feb. de 2020
I have encountered a similar problem. How can I sove it?
  1 comentario
Walter Roberson
Walter Roberson el 8 de Feb. de 2020
If you have a new enough version of MATLAB, change all of your calls to xlswrite() to be calls to writetable() or writematrix() or writecell(), passing in the 'UseExcel', false option. Also, change any xlsread() to readtable() or readmatrix() or readcell() with 'UseExcel', false . This will prevent Excel from being invoked to read of write the excel file.
Avoiding Excel can be important because historically the connection with Excel can sometimes get stuck with a file open as far as Excel is concerned, and then the file is busy when you go to write it. Sometimes this can occur if you do two xlswrite() to the same file in quick succession, as Excel does not necessarily finish flushing the file and closing it before it returns from the ActiveX connection that xlsread() and xlswrite() use on MS Windows machines with Excel installed.

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