error while try to comply a c code into matlab

Question

noam ginio 2022-3-13

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https://ww2.mathworks.cn/matlabcentral/answers/1670489-error-while-try-to-comply-a-c-code-into-matlab

回答： Karanjot 2023-10-6

svm-struct-matlab-1.3.zip

hello

I am a Phd student at the Technion, Israel.

as part of my research I am trying to implement structural svm learining algorithm on datasets collected in laboratory experiments.

I downloaded a code from github that implement struct svm learning in this link (the packege is attached)

https://github.com/vedaldi/svm-struct-matlab

while trying to run it on matlab I recieved this error:

"Error using mex

Deprecated MEX function mexSetTrapFlag was called. Update the source code to use mexCallMATLABWithTrap.

Error in makefile_windows (line 14)

mex -largeArrayDims -c -DWIN ./svm_struct_api.c"

To resolve it i went into the "svm_struct_api.c" file and changed all the mexCallMATLAB functions into mexCallMATLABWithTrap and i still receive the same error

any help in resolving this

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Answer 1

Karanjot 2023-10-6

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在 MATLAB Online 中打开

Hi Noam,

I understand that you would like to resolve the following error in your MATLAB code:

"Error using mex
Deprecated MEX function mexSetTrapFlag was called. Update the source code to use mexCallMATLABWithTrap.
Error in makefile_windows (line 14)
mex -largeArrayDims  -c -DWIN ./svm_struct_api.c"

In releases post MATLAB R2018a, ‘mexSetTrapFlag’ has been removed. The ‘mexCallMATLABWithTrap’ function, similar to ‘mexCallMATLAB’, lets you call MATLAB functions from within a MEX file. In addition, mexCallMATLABWithTrap’ lets you catch (trap) errors. I recommend trying the following:

Replace the occurrences of the now deprecated ‘mexSetTrapFlag’ with ‘mexCallMATLABWithTrap’ in all files in the project, and not just ‘svm_struct_api.c’ file.
MATLAB provides compatibility flags that can help run older code on newer versions. Try using the -compatibleArrayDims flag when compiling the MEX file. Refer to the command below:

mex -compatibleArrayDims -largeArrayDims -c -DWIN ./svm_struct_api.c

To learn more about this, please refer to the below documentation:

https://www.mathworks.com/help/matlab/apiref/mexsettrapflag.html#mw_53bd50c9-bf81-40a4-b55a-adeea4c8d6c1

https://www.mathworks.com/help/matlab/apiref/mexcallmatlabwithtrap.html

I hope this helps!