Load C/C++ shared library into MATLAB - '.dll is not a valid Win32 application'

Thank you in advance.

I tried to load a C library (as enclosed) into matlab and got an error 'dll is not a valid Win32 application' as follows. May ask what is the issue and how can I resolve it ?

% load SDK 
addpath(fullfile(matlabroot,'extern','ifmO3D'))
if not(libisloaded('pmdaccess2'))
    loadlibrary('pmdaccess2','pmdsdk2common.h','addheader','pmddatadescription.h','addheader','pmdsdk2.h')
end

libfunctions('pmdaccess2')

.............Error ...........................
 In loadlibrary
  In ifm_O3D_Interface (line 8) 
Error using loadlibrary
There was an error loading the library "C:\Program Files\MATLAB\R2016a\extern\ifmO3D\pmdaccess2.dll"
C:\Program Files\MATLAB\R2016a\extern\ifmO3D\pmdaccess2.dll is not a valid Win32 application.

Error in ifm_O3D_Interface (line 8)
    loadlibrary('pmdaccess2','pmdsdk2common.h','addheader','pmddatadescription.h','addheader','pmdsdk2.h')

Caused by:
    Error using loaddefinedlibrary
    C:\Program Files\MATLAB\R2016a\extern\ifmO3D\pmdaccess2.dll is not a valid Win32 application.

Answer 1

[Pico Technology]

Hi Seungkook,

Is the dll that you are attempting to load a 64-bit version? If not this is likely to be the issue as MATLAB 2016a is only available as a 64-bit version.

You may also need to set up a 64-bit compiler and call

mex -setup