DLL module not found upon compiling

Hi All,

I have a piece of code that works quite smooth in matlab itself, and now I try to compile it into an executable, but it returns the following error.

there was an error loading the library "DataSourceDLL.dll"

The specified module could not be found.

Bear in mind that I am no expert in DLL's etcetera, but based on previous Q&A's I have

• converted the header into an m.file using this procedure : https://www.mathworks.com/help/compiler/matlab-library-loading.html
• tried to load everything into the executable with the -a command while compiling
• I noticed with dependency walker that some modules showed CPU x86 and some x64 (though surprising to see that most of them are x86, while I run a 64bit machine), could this be the problem? I would actually expect it to be a problem as well when running the code from Matlab itself? Edit, the dll, matlab and the compiler are all 64 bit

any other ideas or solutions?

Thanks,

Kris

Answer 1

[kristof paredis]

Credits to Mathworks support:

• add the thunkfile dll to the application using -a command, see here for more information:

https://www.mathworks.com/matlabcentral/answers/175546-how-to-call-loadlibrary-in-a-compiled-application-by-matlab-compiler-on-windows

• add that DataSourceDLL.dll and all other dependent dlls to the application (dependencywalker will tell you which dlls are missing)

thanks to Matlab support!

Answer 2

[Jan]

Does this help? https://www.mathworks.com/matlabcentral/answers/221845-why-is-my-matlab-utility-not-recognizing-windows-sdk-7-1#answer_314762

[kristof paredis]

Unfortunately not... the SDK error does not come up in my case. However installing the SDK did not change anything...

thanks for the suggestion!

[Jan]

I do not understand your comment. The SDK does not "come up" where? And you did install it already and ran mex -setup to make it the active compiler? And did you consider, that installing the SDK7.1 is not trivial under Windows10, but the instructions given in the link on this page have been required for this person?

Providing the details is more useful than guessing them. ;-)

[kristof paredis]

Hi Jan,

My apologies, I was in a hurry and indeed my answer was not very clear.

I was only referring to the fact that my error does not mention any SDK error, but I did the instal and made it the active compiler and still it returned the same error.

I am running Win 7, and I do not have MS Visual installed (that appears to be causing the problems for Win 10 in the link you provided).

Again, thanks for your help!

[Sébastien]

Did you solve the problem? I have exactly the same issue