Force use as traditional (legacy) DAQ instead of DAQmx

[CDAQRun]

I am using several PXI DAQ devices that, upon install of all the drivers and associated NI software, are recognized as DAQmx in the Measurement & Automation Explorer. However, the application that I wish to use these devices in requires that they be recognized as traditional (legacy) DAQ devices (not DAQmx) for the existing code to work properly. I have installed the traditional DAQ drivers (version 7.50 - beta) alongside the DAQmx drivers but have not yet been able to get my devices to be recognized as legacy.

How can I force the devices to be recognized as traditional (legacy) DAQ instead of DAQmx?

I do not need to use DAQmx for my application. Can I selectively uninstall DAQmx and keep the traditional DAQ drivers.

I am confident that the combination of hardware, drivers, and my OS will work together correctly since, at one point, I did have it set up properly.

[Seth_B.]

What operating system are you using?  The Traditional NI-DAQ 7.5 beta should only be used on Windows Vista.  There is a known issue with the Traditional NI-DAQ 7.5 beta on any OS that will result in being unable to use devices with Traditional NI-DAQ if NI-DAQmx is installed.  There are no plans to release an updated beta version and no known workaround.  We strongly encourage anyone using the Traditional NI-DAQ beta driver to develop and test NI-DAQmx code on a separate machine and to replace the Traditional NI-DAQ code as soon as possible.

[CDAQRun]

I am using Windows 7 (32 bit).  Although it is not officially supported, through great effort, I was able to get it working once before.  But I have been unable to recreate that success. I think it might have required careful installation so as not to install the mx drivers and only installation the traditional drivers.

Are you saying that if I was using Windows Vista, it would automatically recognize these devices as traditional instead of mx?

[Seth_B.]

The issue exists for both Vista and Seven.  Some machines may be able to use both side-by-side, others won't.  We haven't really seen a pattern as to which machines are affected.  The best policy when using the Beta driver is to not install NI-DAQmx along side the beta Traditional NI-DAQ driver, regardless of OS.

[CDAQRun]

I was able to selectively uninstall just the DAQmx drivers, and then install only the traditional drivers.  In doing so, my DAQ devices were properly recognized.  However, there was still a mysterious problem of one of the cards not functioning correctly unless I swapped it with another card in a different slot.  Then Windows saw it and installed it (so say the notification balloon the popped up), and then everything worked fine.