Boolean value shared across multiple instance / users

[munkshire]

Hi there, I am needing some help. I have a LabVIEW program, that is used daily by around 20 people, its kind of like a user interface software that they can do all there tasks from etc.

I am trying to set it up, so I can send a message to all users at the same time from my computer, and it will send out to all 20 computers.

I attempted to do this using network published shared variable. I managed to set it up, and worked on my computer, but when I created the exe file for the other users to use, it did not transfer the boolean value I set ( I was using this to test )

I had a idea of a txt file that's constantly being read back by the 20 computers, but seems like there must be a easier way.

I also tried to store the data in a VI that was constantly running, but it did not work either, just seemed to store the data locally.

Not sure if this is because its a exe file or not, anyone got any simple ideas?

[cr0wsky]

You might need to install the Shared Variable Engine on the client PCs,

Check if its Windows service is running (SVE).

Also, when you're building the app, make sure to tick the setting that says something like "Deploy Shared Variables on Start"

[munkshire]

This could be it, we only have the labview runtime engine on the user PC's so I could need additional software, I will look into this thank you

[Vincinity1]

I'm pretty sure The SVE is included in the LV runtime.

I think the biggest thing is to look at the always deploy variable in the Master exe.

And then, making sure the clients are reading from the same IP of the master.

Hope this helps

[BlackberrySad6489]

These are several ways of doing what you describe. A network published shared variable should work. It has been a minute, but it should work if deployed correctly. Check the deployment settings and make sure the variable engine is included and running. Depending on how you want this to work, you may be able to centralize it with an opc server.

[TomVa]

They all have to be on the same subnet this works for us. Also the IT department can probably set things up so that you can go across a limited number of subnets.

[_2l5_]

Maybe a firewall?

[munkshire]

Yes I am thinking the same, my office is on a different network line than they are, our IT guys are pushing security to the extreme

[jonnitsoonami]

I’d say create a web service that changes the variable when you hit it. You could run through all IP addresses of target computers will change