Restrict Application to open once

Ignition
1

Is there a way to restrict the user to launch the application only once? thanks

2

Yes, you can use a client startup event script to check the sessions returned by system.util.getSessionInfo(), and if any other client has the same project open, exit. A message box before exiting might be useful to show where the other client is running.

3

Here’s what I’ve done in our systems. This gives the option to close the client or not, usefull if you have a designer open because it counts that as an open client.

# Check to see if there is already an Ignition client open on this PC. Trying to cut down on multiple clients open on one machine.
projName = system.util.getProjectName()
hostName = system.tag.read("[System]Client/Network/Hostname").value
sessionInfo = system.util.getSessionInfo()

rowIndex = 0
clientCount = 0
for row in sessionInfo:
	if sessionInfo[rowIndex][1] == projName and sessionInfo[rowIndex][2] == hostName:
		clientCount += 1
		if clientCount > 1:
			if system.gui.confirm("There is already a client open on this PC, do you want to close this client?", "Client Already Running"):
				system.util.exit()
			break
	rowIndex += 1
1 Like
4

Thank you Duffanator! It works great.