error 1921

[pabsta]

I get the following message: Error 1921. Service 'National Instruments LXI Discovery Service' (niLXIDscovery) could not be stopped...

I can't install I/O assistant, VISA, or other instrument drivers until this is solved

Please help

[Carl.M · Accepted solution]

Hi Pabsta,

During the installation the NI-VISA automatically discovers compatible LXI instruments or resource that becomes available (using DNS protocols) which LabVIEW and MAX can then control.

Do you have any LXI based equipment installed?

More details on NI-VISA interaction with LXI resources on this link:

http://zone.ni.com/devzone/cda/pub/p/id/597

What could happen is during a previous installation or driver upgrade the service was still running or files got corrupted with a different version.

I would try uninstall the last driver installed and then reboot the PC.

If this doesn't solve the problem then I would try to stop the service manually from the registry as shown into this KB link:

http://digital.ni.com/public.nsf/allkb/89EBD22F07AF0E0086256C1D0070844A

Another Thread also exist on the Error 1921 for information...

http://forums.ni.com/ni/board/message?board.id=190&message.id=725&requireLogin=False

Hope this help!

[pabsta]

Carl

Thanks for clearing this up! It has been a few years and I'm trying to become re-acquainted with Labview. I needed to use DAQ assistant, not I/O assistant - as I have a daq board. When I tried to load software drivers for I/O assistant, it locked up because the proper hardware wasn't present.

Arron