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Error with using loadlibrary() with .lib file

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Mark Kelly
Mark Kelly il 1 Mar 2024
Risposto: Gyan Vaibhav il 7 Mar 2024
I'm trying to get MATLAB to load the library of an NI library file (.lib) named FlexMS32.lib. I downloaded the 32-bit MATLAB R2015b environment so it could interface with the file. However, when I try to load it, it returns this error:
Error using loaddefinedlibrary
...FlexMS32.lib is not a valid Win32 application.
I have no idea why it's returning this error. This is all the code I'm running:
loadlibrary('FlexMS32.lib', 'flexmotn.h', ...
'addheader', 'flexcomp.h', ...
'addheader', 'MotnCnst.h', ...
'addheader', 'MotnErr.h', ...
'addheader', 'nimcBasicTypes.h' ...
);

Risposte (1)

Gyan Vaibhav
Gyan Vaibhav il 7 Mar 2024
Hi Mark,
If you could provide the lib file it would be easier for me to determine the error. However, looking at the error, I feel there are two possible reasons for this.
  1. Static libraries can't be loaded using loadlibrary. You have to convert it to a dll before using it. I've also read from another question's answer that one way to do this is to create a mex file that calls the function in the library.
  2. The error also suggests a possiblity that that a 64 bit operating system is trying to load a 32 bit Win32 file. Follow this answer to use the workaround. https://www.mathworks.com/matlabcentral/answers/99364-how-do-i-resolve-loadlibrary-failed-with-error-193-1-is-not-a-valid-win32-error-message-in-simul
Hope this helps.
Thanks
Gyan

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