Winn 11 and older built apps

[bill_gilbert]

Just heard from a customer here at UMN who is using a temp control application I built for him in the 2020 development system. He just upgraded to WIn 11 and the app has stopped working.The system uses a Measurement Computing USB-TEMP unit with the NI drivers.

I just looked at the compatibility chart and am hoping that it applies mostly to the development system:

https://www.ni.com/en-us/support/documentation/compatibility/17/labview-and-microsoft-windows-compat...

For years we've been able to install older apps in new versions of windows. I have no idea what was involved in the upgrade procedure, but am hoping that uninstalling and doing a fresh reinstall from the installer I provided might get him fixed. Any body know if this will work, or is he screwed, and has to roll back to Win10?

I'm still using LV2020 under Win 10 and have no plans to up grade anytime soon.

[santo_13]

AFAIK, the compatibility is for both development and deployment.

Edit: Yes, it applies to LV RTE too, this means your customer has to go back to Win10 or you need to rebuild the app in LV2022 Q3 to be safe (some have successfully run older builds on Win11 but there could be unknown pitfalls).

Measurement Computing devices use their own driver and not NI's (two different companies) - good to check with MCC if their driver works in Win11

The important question is what kind of error does your customer face? does it not install? does it not launch? 

[AeroSoul]

After one of our lab computers got accidentally updated to win 11, our app stopped working normally. We solved it by downgrading back to win 10 and then it worked normally again.

[rolfk · Accepted solution]

Actually, my admittingly limited testing showed that there is no fundamental incompatibility with Windows 11 even for older LabVIEW versions as far back as 2009. (I didn't really try to go further). That said, there certainly is room for things like device drivers to not quite work as expected. Device drivers hook directly into the kernel and there were some security changes in Windows 11 that could affect certain drivers. But I could run the LabVIEW IDE and LabVIEW Built executables in Windows 11 without problems even in previous versions of LabVIEW.

One correction, while Measurement Computing is an NI subsidiary, its hardware is (mostly) not NI compatible. So if you have an MCC USB device, you want to use the MCC ULx for NI LabVIEW library and the Universal Library driver. And that is highly .Net based, so that might add an additional kink in the cable, aside from the possible needed kernel device driver. According to the driver information page here, they explicitly state that the currently latest version also works in Windows 11. Things might be as simple as downloading and installing the latest version on affected computers.

[bill_gilbert]

Thanks to all and RolfK in particular for the quick answers. I think we'll try the latest mccdaq drivers, and if that doesn't work, colleague will  have to find another Win10 machine or roll his back. Will let you all know how this experiment in the great petri dish of Windows goes.

Bill Gilbert

[bill_gilbert]

User reports that after reinstalling the built Labview temp control application in Win11, then installing the latest MCC software, It's working again.

Whew!

BG