call dlls in for compiled application

Hi all

i built a app with app designer. I get an error "No class lib..\dev\bin\64-bit\nilibddc.dll." after install the app

One of the function i need to call the dll provided by NI http://www.ni.com/product-documentation/3727/en/#toc4.

Relative path is used in the function ".\dev\bin\64-bit\nilibddc.dll'"

I package the app and install in another PC. The GUI can not find the dll path and load the dlls.

Is something wrone here do define the dll path.

Or i do not coeectly take care of nilibddc_thunk_pcwin64.dll file?

Thanks a lot

libname = 'nilibddc';

NI_TDM_DLL_Path = '.\dev\bin\64-bit\nilibddc.dll';

NI_TDM_H_Path = '.\dev\include\64-bit\nilibddc_m.h';

if ~libisloaded(NI_TDM_DLL_Path)

% loadlibrary(NI_TDM_DLL_Path,NI_TDM_H_Path);

loadlibrary(NI_TDM_DLL_Path, @mylibraryfile);

libfunctions(NI_TDM_DLL_Path,'-full');

end

Answer 1

[Robin]

I have fixed the issue

1) created the prototype m–file & library_thunk_pcwin64.dll according https://www.mathworks.com/matlabcentral/answers/175546-how-to-call-loadlibrary-in-a-compiled-application-by-matlab-compiler-on-windows

2) Do not use relative path here for the function to call dlls. This is a mistake i made

filepath = fileparts(mfilename('fullpath'));

NI_TDM_DLL_Path = [filepath,'\dev\bin\64-bit\nilibddc.dll'];

3) package the app, update "Shared resources and helper files" to add the dll folder prototype m–file & library_thunk_pcwin64.dll into the app.