usb-6251 installation problem

[justleavemealone]

I have two identical installs of labview 8.0. Same disk, same day. I followed the instructions in both cases and the NI USB-6251 Mass Termination works on the desktop but not the laptop. The device isn't recognized by the Ni device manager but is by the windows device manager on the laptop.

I tried a reinstalling the laptop software with no effect.

Please help.

Message Edited by justleavemealone on 01-12-2007 12:59 PM

[justleavemealone]

I have installed the Ni-Daqmx software on two very different desktops and the USB-6251 worked with a new labview 8.0 install both times. When the same routine was followed on a newer hp laptop with the same version of labview, it is not recognized by the Ni Device manager. Windows XP does recognize it, and even says it is working properly. No firewall is on. Anyone have an idea on how to get it working?

[Raajit_Lall]

Hi,

Could you go to the device manager on the laptop and find the USB device, right click on it and select uninstall. Once you have done that, plug in the device again, restart windows and let windows automatically install the driver.

Sometimes the power supplied by the laptop itself is not enough for the USB Device. Make sure that the laptop you have provides the correct power to run the USB device.

Also, could you please follow the steps in the following knowledgebase article and make sure that the device shows up under Measurement and Automation Explorer.

DAQ Assistant Says No Supported Devices Found

Sometimes the NI-DAQmx installation might be corrupt. If you open up Measurement and Automation Explorer and expand software, you should see NI-DAQmx listed there. Clicking on it will also show you the version number in the window on the right. Could you try uninstalling the driver and installing it again on the laptop.

Regards,

Raajit

[NRuff]

Be sure you are running at least NIDAQ8.3 on the machines.  I had plugged in a USB-6251 under NIDAQ8 and the database became corrupted.  When I upgraded to 8.3 I still could not see the USB device properly.  A previous device was in the devices menu even though it was not there.  I finally had to delete files in the MAX directory.  When I rebooted the machine MAX recreated the files and the device was recognized, the ghost device was gone.  The directory was C:\Program Files\National Instruments\MAX\Data    

and the files were:

config3.mxd          config2.mxs          config3.mxs.bak    mxsjar.ini

[justleavemealone]

I attempted the uninstall and reinstall with no change.
 The device does not show up under Measurement and Automation Explorer, so I do not see the usb-6251 under the NI-DAQmx header listed. However the device does properly show up but does show up under the windows device manager.

[justleavemealone]

Good idea about trying to delete the max files but it didn't seem to help me. They were recreated upon restarting the computer but the device is still missing from the National Instruments device manager.
Thanks for the advice!

[Salvador_Santolucito]

Hi,

You mentioned that your USB-6251 "does properly show up but does show up under the windows device manager."  Can you explain this a bit more?  Does anything show up for it under Windows device manager?  Do you get any errors when going through the Windows popups for installing the driver software (when you connect the device).

If the device does not show up in Windows device manager under "Data Acquisition Devices" then the problem is related to how Windows is recognizing the device and not the MAX database.

[justleavemealone]

Under the windows device manager, the device shows up properly and windows labels the device a "data aquisistion device", specifically "usb-6251 (mass termination)".

Windows installs the device, without issue (no pop-ups). Even the "ready" light on the usb device comes on when it is plugged into the laptop.

This makes me believe that the problem is not with windows but with the NI software. Specifically, I have no idea.

[Salvador_Santolucito]

OK,

So the device is properly recognized in Windows but does not show up in MAX.  Please follow these instructions:

1) In Windows device manager, right click on the device and select "Uninstall"
2) Disconnect the USB device from your computer.
3) Shut down the computer and reboot into safe mode.
4) In Windows Explorer, go to C:\Program Files\National Instruments\MAX
5) Rename the "Data" directory to something else (i.e. Data_old)
6) Reboot your computer (regularly, not safe mode)
7) Reconnect your USB device
😎 Follow the installation menus on the screen and verify that the device now shows up in MAX.

Thanks,
Sal

[justleavemealone]

I followed the instructions exactly and the device is still not seen by MAX.