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Why is microservice able to load 'txt' files from subdirectory but not ".mat" files?

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Aran Ofer
Aran Ofer 2024-3-27
评论： Aran Ofer 2024-3-28
consider this function loadFile.m:
function w = loadFile()
readlines("subdirectory/txtfile.txt")
load('subdirectory\someMatFile.mat')
w = 1;
end
Which I compiled using:
compiler.build.productionServerArchive
With options set to Include both files in subdirectory as 'Additional Files'. Then I compiled the function to a microservice using compiler.package.microserviceDockerImage.
The issue is - When I start the microservice as a docker container, the function is only able to read from the .txt file in the subdirectory, and not load the '.mat'. This Issue occurs only when loading mat file from subdirectory. if it is located in the same directory as function when compiling, loading is available when running as container.
I modified the DockerFile and rebuilt the image to make the script run as root, so I am confident this isn't a permissions issue.
The error message recieved in the http response:
"error":{"id":"MATLAB:load:couldNotReadFile","message":"Unable to find file or directory 'subdirectory\\someMatFile.mat'}

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采纳的回答

Fangjun Jiang
Fangjun Jiang 2024-3-27
编辑：Fangjun Jiang 2024-3-27
Ran in:
Notice the two backslashes "\\" in the error message about the file?
"error":{"id":"MATLAB:load:couldNotReadFile","message":"Unable to find file or directory 'subdirectory\\someMatFile.mat'}
Does it make a difference between slash "/" and back slash "\"? Try to use
fullfile('subdirectory','someMatFile.mat')
ans = 'subdirectory/someMatFile.mat'
filesep
ans = '/'

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