Firstly, make sure that the 'nidaq' legacy interface adaptor is successfully registered. In Simulink data acquisition that uses legacy interface, you can try the below mentioned workaround, if the device is not being detected inside the DAQ blocks. This issue is specific to Data Acquisition with Legacy interface in 32 bit MATLAB.
Run the MATLAB once in elevated Administrative mode in order to register the Data Acquisition Toolbox adaptor:
1. Right click on the MATLAB shortcut or the file MATLAB.exe and select "Run as Administrator". 2. Once MATLAB starts execute the "daqregister" command as normal- >> daqregister('nidaq') 3. Close MATLAB and start it as usual.
After adaptor registration with daqregister('nidaq') as described in the solution above , verify that the device is accessible with the legacy interface: >> hw = daqhwinfo('nidaq') >> hw.InstalledBoardIds >> hw.BoardNames >> hw.ObjectConstructorName
