Hello, I have developped a vision application that visualises production data using multiple named queries. The application works so fine, except that sometimes it freezes (not responding) for a couple of seconds. In the diagnostic I found this entry many times : "Non-responsive UI thread detected…

The very first thread in that dump is running a named query from a custom component method (updateDailyTrefilage). Which is running from a property change event. That event runs in the foreground thread, and any delays will freeze the UI. Run your named queries from named query bindings. If you …

Thank you @pturmel for your valuable hint. In fact I have built my whole application on running multiple named queries on a script fired upon a property change .. which makes sense to the unresponsive UI thread issue I have. The problem now is that I am doing further complex calculation (productio…

Scripts are automatically invoked on the EDT for thread safety when interacting with Swing, but you can always do your own heavyweight processing in an asynchronous thread and move back to the EDT yourself. That's the entire raison d'etre of the system.util.invokeAsynchronous function Phil mentioned…

Deep discussion here: [image] Update GUI via Asynchronous thread Ignition I’ve got a script I am experimenting with that can take a lot of time to execute, so I now use the system.util.invokeAsynchronous to run the script in a separate thread to keep the GUI f…

Thank you @pturmel and @paul-griffith for your support and help. I'd be honest to say that I was suspecting my need for an asynchronous call method, but I am not used to multithreading in general (and in ignition in particular) so it is kind of a big topic to me. My problem was solved by simply us…

The diagram is BROKEN. You cannot update the UI components from that background thread. It may appear to work, but will intermittently crash your Vision client. Go back and re-read the old topic I linked. And property access (read or write) or method calls on components must occur on the UI thre…

Refactor your custom methods for "heavyweight calculations" to the script library, and then you can call them as needed from whatever function was invoked asynchronously. Any swing component property values that are needed for the calculation must be packaged up and delivered to the asynchronous fun…

Non-responsive UI thread detected. Stack saved at ... But I couldn't find where exactly

Ignition

pturmel June 19, 2026, 7:29pm 5

Deep discussion here:

Yes, old but still applicable.