Using the LabVIEW Shared Variable

[bmann2000]

I have successfully used the Shared Variable to share a boolean value between two .exe LabVIEW 2018 applications.

I then deployed the two executables to several target PCs, the first few worked okay, but on one of the PCs, the variable is not shared.

On the problem PC, I opened the Project from source and got warnings that DAQmx VIs were missing.  I then used Package Manger to install the required components, as per this solution https://knowledge.ni.com/KnowledgeArticleDetails?id=kA00Z000001DbLBSA0&l=en-GB

I appreciate that the components of the development system are independent of the run-time engine, but I though this is maybe a clue.

The shared variable is still not working.

What run-time component is missing, that is required to make the shared variable work?

[wiebe@CARYA]

It could be a firewall issue...

[BertMcMahan]

I'd heavily recommend building an installer for the exe's. It'll automagically include all needed runtime components (if you check the box to do so).

[bmann2000]

The installer informing me of the required components sounds like a good method.

Now the installer wants me to provide media "LabVIEW 2018 Platform".

My development PC has LabVIEW 2018 and drivers installed, but I download the drivers again and pointed the installer prompt to the folder.  It's not the correct folder media, see picture below.

Where do I find "LabVIEW 2018 Platform" ?

[Joe_Guo]

check if the "NI Variable Engine",  "NI PSP Service Locator" and "NI Configuration Manager" services are running.  

[bmann2000]

On the PCs where the shared variable is working as expected, I can see that "NI Variable Engine" & "NI PSP Service Locator" are both running, but not "NI Configuration Manager".

On the PC where the shared variable is NOT working, I can see that "NI Variable Engine" & "NI PSP Service Locator" are both running, but not "NI Configuration Manager".

[playerm1]

It will be a pain to download, but you can try this:

https://www.ni.com/en/support/downloads/software-products/download.software-platform-bundle.html#544...

[Joe_Guo]

another tool you can use is the distributed system manager, which can be used to view deployed variables on either local or remote system.

[bmann2000]

I tried the Software Platform Bundle, it is not the media LabVIEW is requesting, see below.

Is it possible that Fall 2018 is not the version LabVIEW wants?

[Joe_Guo]

Shared variable is installed with the LabVIEW runtime engine.  the only other thing you might need might be the Datalogging and Supervisory Control module.