One particular window of my clients freezes at least twice in 8 hours. This window uses quite a big UDT composed mainly of OPC tags binded dynamically to a template… there is also some scripting behind. I was trying to find the root cause so I simplified my script and made few changes but the freeze is still occurring. I’m using default scan class for my OPC tags (1000ms), I was wondering if this could come from the scan class ? maybe I should set it to 5sec at least?