loadlibrary works on 32 bit but not 64 bit MATLAB

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Emma
Emma 2017-4-3
评论： Walter Roberson 2017-4-6
I am trying to load a set of dlls from National Instruments in MATLAB so that I can interface with the National Instruments DAQ card through MATLAB. This has worked in the past using 32 bit MATLAB (on a 64 bit machine) however it is not working on 64 bit MATLAB. How can I fix this?
I am running the following command: funclist = loadlibrary('nicaiu.dll','nidaqmx.h','alias','myni');
and get the following error:
"Error using loadlibrary There was an error loading the library "C:\Users\ecating\Documents\MATLAB\Version_1\V1_scripts_DoNotDelete\NI_DAQ_scriptsAndInfo\nicaiu.dll" C:\Users\ecating\Documents\MATLAB\Version_1\V1_scripts_DoNotDelete\NI_DAQ_scriptsAndInfo\nicaiu.dll is not a valid Win32 application.
Error in c_PCIE6321 (line 55) funclist = loadlibrary('nicaiu.dll','nidaqmx.h','alias','myni');
Caused by: Error using loaddefinedlibrary C:\Users\ecating\Documents\MATLAB\Version_1\V1_scripts_DoNotDelete\NI_DAQ_scriptsAndInfo\nicaiu.dll is not a valid Win32 application."
I am running MATLAB 2016b (version 9.1) on Windows 10.

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回答（1 个）

Varun Gunda
Varun Gunda 2017-4-6
The "is not a valid Win32 application" error usually means that you are attempting to load a 32-bit DLL using 64-bit MATLAB. Check if there are 64-bit versions of the NI DLLs available and download them. Or You can try installing 32-bit MATLAB on your 64-bit machine and use them as you were doing previously.

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