Instrument Control Using National Instruments GPI-USB-HS

Hello,

I am trying to set up communication between an HP 4195A spectrum/network analyzer and Matlab using a NI GPIB-USB-HS interface. I have downloaded the NI-488.2 driver, and have used that tool to successfully assign my instrument a GPIB address communicate with my instrument. However, I am unable to create the gpib object in Matlab. When I enter: >> instrhwinfo('gpib', 'ni');

I get the error message: ??? Error using ==> instrhwinfo at 234 Specified ADAPTOR was not found or could not be loaded.

Where can I find the missing adaptor? It seems like I need a driver for the NI GPIB-USB interface (.mdd or .dll file). I tried to create a gpib interface object using the tmtool but the only vendor was 'ics' while I need 'ni'. I'd appreciate if someone could send me the driver or give me a possible workaround.

Thanks

[Srikanth]

update: I have located the NI GPIB driver. I found the file "mwnigpib.dll" in the instrument control toolbox directory (the ics gpib driver is also in that location). It seems as though this driver is not registered. I tried daqregister, but that did not work. Is there a command to register gpib drivers?

Also, there are several gpib drivers in that folder (agilent, ni, ics, iotech, keithley) but for some reason instrhwinfo('gpib') only returns ics.

[Walter Roberson]

Did you run daqregister as administrator ?