How do I install a second USB-8451using an alias in our VI's?

[jconway@lexmark.com]

I am trying to write VI's that use USB-8451 aliases, set up in the MAX utility.  I save the alias name as "USB-8451".  This usually works, but when I try to use another USB-8451 I use the following procedure:

To change NI 8451 unit out:

1:  Goto C:\vxipnp\winnt\nivisa\visaconf.ini
2:  Delete USB-8451 Row
3:  Change NumAliases Row -1
4:  Save
5:  Plug in new 8451 to the computer
6:  Gog NI's Measurement and Automation
7:  Go to the USB device and rename the alias to "USB-8451"

As I mentioned this usually works.  But currently I'm working on a laptop where the alias doesn't seem to be registering.  Any hints?

[Chris_R.]

Hello,

The process should be the same for a desktop or a laptop computer, so I have a few questions for you.  Do both of the systems have the same OS and driver versions?  When you reopen the visaconf.ini file, are the settings you saved still there?  When you say that the alias isn't registering, do you mean you can't set it in MAX?

I am not sure if you are using LabVIEW or not, but LabVIEW 8.2+ has autodetection of the 845x devices which may be useful to you as well.