# UDT Leased Tags

**URL:** <https://forum.inductiveautomation.com/t/udt-leased-tags/9470>\
**Category:** Ignition\
**Created:** [December 20, 2014, 4:56pm UTC](https://forum.inductiveautomation.com/t/udt-leased-tags/9470 "2014-12-20T16:56:15Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![cody.tamaki](https://avatars.discourse-cdn.com/v4/letter/c/b487fb/32.png) [@cody.tamaki](https://forum.inductiveautomation.com/u/cody.tamaki)\
**Post date:** [December 20, 2014, 4:56pm UTC](https://forum.inductiveautomation.com/t/udt-leased-tags/9470/1 "2014-12-20T16:56:15Z")

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Hello,

I’m working on a project where we’re using lots of UDTs and templates for devices on the screen. All of our templates look at about 3 or 4 tags per UDT and the rest of the tags inside our UDTs are shown on popups (about 10-15). Currently we have all tags that are used in templates and plant mimic screens on real-time scan classes to avoid re-subscribing scan classes when screens are changed. The rest of the tags for popups are in a leased scan class.

We’re having problems when someone changes to a busy screen where all devices on the screen flash red and slowly resubscribe. I checked my scan classes and saw that the number of tags being leased is much higher than I would expect them to be. Are all tags in a UDT leased when a template is shown on a screen or only the tags that are being used by that template?