MATLAB: Do I get “Warning: Misregistered adaptor found.” when I try to register the adaptor using the Data Acquisition Toolbox 2.2 (R13)

adaptordaqData Acquisition Toolboxmisregisterdwarning

I have created a driver using the Data Acquisition Toolbox Adaptor Kit. The code compiles, but when I try to register the .dll using DAQREGISTER, I receive the following warnings:

 Warning: Misregistered adaptor found.
 Warning: Misregistered adaptor found.
 Warning: Misregistered adaptor found.
 ans =
 'adaptor_name.dll' successfully registered.

where adaptor_name is the name of my adaptor.

When I try to use DAQHWINFO on this adaptor, I receive the following errors:

 ??? Error using ==> daqhwinfo
 Error using ==> daqhwinfo
 Failure to open requested data acquisition device. Class not registered.

Best Answer

This issue occurs when the adaptor is built with a version of Microsoft Visual C++ that does not have the most recent service packs applied. Please use the Microsoft Visual C++ 6.0 SP6 for building an adaptor for the Data Acquisition Toolbox. See your system administrator for updating your service pack.

Related Solutions

MATLAB: Do I receive the warning “The device adaptor is not in the expected location” when using the Data Acquisition Toolbox

This warning can occur if the "mwnidaqmx.dll" adaptor is not properly registered with Windows.

In order to properly register the adaptor, the MATLAB process needs to be run with administrative privileges.

To register the adaptor, use the following steps:

1) Close all open instances of MATLAB

2) Right-click on the MATLAB shortcut or the file MATLAB.exe and select "Run as Administrator"

3) Once MATLAB starts, execute the following MATLAB commands:

>> rehash toolboxcache

>> daqreset

>> daqregister('nidaq')

4) Close and re-open MATLAB.

MATLAB: Is the Data Acquisition Toolbox using the AdaptorDLL from a different release of MATLAB

The AdaptorDLL version that is returned by the DAQHWINFO command is the version of the adaptor that is registered. If you have an adaptor from a certain release of MATLAB registered, then when you run the DAQHWINFO command in a different release of MATLAB, it will still return the version of the adaptor that is registered. In order to use the adaptor version from a release that you desire, you can register it using the following steps:

1. Execute the following code to unregister the adaptor that is currently registered.

daqregister('nidaq','unload');

2. Restart MATLAB.

3. Execute the following code to register the adaptor from the release of MATLAB that you are running.

daqregister('nidaq');

After registering the adaptor from the correct release, you may verify this by running DAQHWINFO.

Best Answer

Related Solutions

MATLAB: Do I receive the warning “The device adaptor is not in the expected location” when using the Data Acquisition Toolbox

MATLAB: Is the Data Acquisition Toolbox using the AdaptorDLL from a different release of MATLAB

Related Question