Problem loading library nicaiu.dll

MATLAB R2012b NI PCI 6534

I am trying to load the NI library using the following command: loadlibrary('nicaiu.dll','NIDAQmx.h','alias','myni')

The compiler I used was: Microsoft Software Development Kit (SDK) 7.1 compiler.

However, I got the following list of warnings from MATLAB:

Warning: Warnings messages were produced while parsing.  Check the functions you intend  to use for correctness.  Warning text can be viewed using:
 [notfound,warnings]=loadlibrary(...) 
> In loadlibrary at 344 
Warning: The data type 'error' used by function DAQmxGetTaskAttribute does not exist. 
> In loadlibrary at 403 
Warning: The data type 'FcnPtr' used by function DAQmxRegisterEveryNSamplesEvent does
not exist. 
> In loadlibrary at 403 
Warning: The data type 'FcnPtr' used by function DAQmxRegisterDoneEvent does not exist. 
> In loadlibrary at 403 
Warning: The data type 'FcnPtr' used by function DAQmxRegisterSignalEvent does not
exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxGetChanAttribute does not exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxSetChanAttribute does not exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxGetTimingAttribute does not exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxSetTimingAttribute does not exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxGetTimingAttributeEx does not
exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxSetTimingAttributeEx does not
exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxGetTrigAttribute does not exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxSetTrigAttribute does not exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxGetReadAttribute does not exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxSetReadAttribute does not exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxGetWriteAttribute does not exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxSetWriteAttribute does not exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxGetExportedSignalAttribute does
not exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxSetExportedSignalAttribute does
not exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxGetScaleAttribute does not exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxSetScaleAttribute does not exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxSetBufferAttribute does not exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxSetSwitchChanAttribute does not
exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxGetSwitchDeviceAttribute does not
exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxSetSwitchDeviceAttribute does not
exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxSetSwitchScanAttribute does not
exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxGetDeviceAttribute does not exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxCreateWatchdogTimerTask does not
exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxGetWatchdogAttribute does not
exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxSetWatchdogAttribute does not
exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxGetCalInfoAttribute does not
exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxSetCalInfoAttribute does not
exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxGetPhysicalChanAttribute does not
exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxGetRealTimeAttribute does not
exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxSetRealTimeAttribute does not
exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxGetPersistedTaskAttribute does not
exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxGetPersistedChanAttribute does not
exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxGetPersistedScaleAttribute does
not exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxGetSystemInfoAttribute does not
exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxSetDigitalPowerUpStates does not
exist. 
> In loadlibrary at 403 
Warning: The data type 'error' used by function DAQmxSetAnalogPowerUpStates does not
exist. 
> In loadlibrary at 403

Answer 1

[ryan]

http://www.mathworks.com/support/solutions/en/data/1-63MY7L/index.html?solution=1-63MY7L

I had the same problem, and found this very helpful

Answer 2

[Philip Borghesani]

Some of these warnings are unavoidable and others may be fixable. If the functions you wish to use do not have warnings associated with them then you are fine. Otherwise use the mfilename option to loadlibrary examine the file and post the line for the function you wish to call and the comment before it. It is possible that there is a #include statement missing from the header NIDAQmx.h that is needed by MATLAB.

These warnings cannot be fixed because function pointers are not supported by loadlibrary:

Warning: The data type 'FcnPtr' used by ...