nidevldu is not started after downgrading from DAQmx 8. 8 to DAQ 7.2

[llliu]

Our application used PCI 6024-E with NI-DAQ 7.2 installed.  We upgraded to PCI-6221 with NI-DAQmx 8.8 at one time but eventually decided to go back to the original setup.  We uninstall the NI-DAQmx 8.8, remove the PCI-6221 card, re-install the NI-DAQ7.2, and then re-insert the PCI 6024-E back. To our great surprise, the nidevldu can't be started!  As a result, NI Equipment and Automation Explorer couldn't find the PCI-6024E even though the Windows Hardware Device Manager has no trouble to find it. Thank you. 

[CWolf]

Hello,

I'm sorry you are having trouble with the nidevldu service.  Did you see this knowledgebase article?   Also, why did you revert back to a previous version of the drivers?  The 6024e should work just fine withthe DAQmx 8.8 drivers, and we receommend upgrading to DAQmx because the legacy NI-DAQ drivers are no longer officially supported, and thus newer devices are not supported by these drivers, and also no improvements or bug fixes are being made to them.  

-Christina