load .mat file fails in Web App

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Deividas Eringis 2021-8-13

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https://ww2.mathworks.cn/matlabcentral/answers/897622-load-mat-file-fails-in-web-app

评论： Deividas Eringis 2021-8-16

test2.mat

在 MATLAB Online 中打开

Hello,

i am trying to implement save/load functionality for a web app, everything works fine locally but load(filename) function fails on a web app,

%% Save Function
[file,path] = uiputfile('*.mat','Save patient data as .mat file')
if file~=0
    resultFilePath = fullfile(path,file)
    inputs={};
    for i=1:numel(app.UIList)
        inputs{i}=app.UIList{i}{2}.Data; % app.UIList{i}{2} are UITables
    end
    save(resultFilePath,'inputs','-v7','-nocompression')
end
%% Load Function
[file,pathn] = uigetfile('*.mat','File Selector');
disp(file)
disp(pathn)
if isequal(file,0)==false
    inpuFilePath = fullfile(pathn,file)
    try
        Data=load(inpuFilePath);
        inputs=Data.inputs;
        %
        %... CODE BLOCK FOR PROCESSING 'inputs'
        %
    catch ME
         fprintf('error: \n');
         fprintf('%s : %s\n',ME.identifier,ME.message);
         fprintf('........\n');
         fid=fopen(inpuFilePath);
         dat=fread(fid,[1,90],'uint8');
         fprintf('%s ',dat)
         fprintf('\n')
    end
end

Saving works fine, i get a file that i can load in matlab and everything is there, so the file is not corrupted, however when i load in web app, it says it is corrupted, why???

2021-08-13 10:51:47 test2.mat is uploaded successfully
2021-08-13 10:51:47 test2.mat
2021-08-13 10:51:47 /local/MathWorks/webapps/R2020b/USR/services/mdwas/sessions/8c115db5-9dc8-44be-88e6-928d4a4c6f89/1/
2021-08-13 10:51:48 inpuFilePath =
2021-08-13 10:51:48 '/local/MathWorks/webapps/R2020b/USR/services/mdwas/sessions/8c115db5-9dc8-44be-88e6-928d4a4c6f89/1/test2.mat'
2021-08-13 10:51:48 error:
2021-08-13 10:51:48 MATLAB:load:unableToReadMatFile : Unable to read MAT-file /local/MathWorks/webapps/R2020b/USR/services/mdwas/sessions/8c115db5-9dc8-44be-88e6-928d4a4c6f89/1/test2.mat. File might be corrupt.
2021-08-13 10:51:48 ........
2021-08-13 10:51:48 MATLAB 5.0 MAT-file, Platform: GLNXA64, Created on: Fri Aug 13 10:49:37 2021

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Muhammed Yaseen 2021-8-16

编辑：Muhammed Yaseen 2021-8-16

I understand that you are unable to load a file which you have created in the Web app, but you are able to load it in MATLAB. Can you see if the following links can help?

http://www.mathworks.com/matlabcentral/answers/92700-why-am-i-unable-to-load-any-user-created-or-shipped-with-matlab-mat-file-in-matlab-7-10-r2010a

https://www.mathworks.com/matlabcentral/answers/631254-load-mat-file-in-web-app-server

Deividas Eringis 2021-8-16

i have seen the second link, that's why i did fread() to see if the file is there at all,

the first link is interesting it might be that there is an older runtime installed, i will contact my server administrator and check, thanks, i know for a fact that the oldest runtime installed could be 2019b which i would not expect to have problems loading .mat files.

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