# Non-responsive UI thread detected. Stack saved at ... But I couldn't find where exactly **URL:** \ **Category:** Ignition\ **Tags:** ignition81, scripting, vision\ **Created:** [June 19, 2026, 8:42am UTC](https://forum.inductiveautomation.com/t/non-responsive-ui-thread-detected-stack-saved-at-but-i-couldnt-find-where-exactly/116073 "2026-06-19T08:42:21Z")\ **Posts on this page:** 1\ **Showing post:** 5
**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\ **Post date:** [June 19, 2026, 7:29pm UTC](https://forum.inductiveautomation.com/t/non-responsive-ui-thread-detected-stack-saved-at-but-i-couldnt-find-where-exactly/116073/5 "2026-06-19T19:29:44Z")
Deep discussion here: > [@Update GUI via Asynchronous thread](https://forum.inductiveautomation.com/t/update-gui-via-asynchronous-thread/9666): > > 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 from locking up. I am using the asynchronous thread to copy files from one place to another, and I would like to show the progress of the file copy with a progress bar. How would I go about this? I am importing a few python libraries to do this. import shutil def fileTransfer(): path = system.file.openFile() … Yes, old but still applicable. --- _[View the full topic](https://forum.inductiveautomation.com/t/non-responsive-ui-thread-detected-stack-saved-at-but-i-couldnt-find-where-exactly/116073)._