# Does system.tag.readBlocking trigger a leased tag to get a new value?

**URL:** <https://forum.inductiveautomation.com/t/does-system-tag-readblocking-trigger-a-leased-tag-to-get-a-new-value/104510>\
**Category:** Ignition\
**Created:** [April 1, 2025, 12:30pm UTC](https://forum.inductiveautomation.com/t/does-system-tag-readblocking-trigger-a-leased-tag-to-get-a-new-value/104510 "2025-04-01T12:30:49Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Brian\_Stilson](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/brian_stilson/32/73410_2.png) [@Brian\_Stilson](https://forum.inductiveautomation.com/u/Brian_Stilson)\
**Post date:** [April 1, 2025, 12:30pm UTC](https://forum.inductiveautomation.com/t/does-system-tag-readblocking-trigger-a-leased-tag-to-get-a-new-value/104510/1 "2025-04-01T12:30:49Z")

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I have a bunch of leased tags that take up a lot of data but don't update very often. I noticed this morning that they were all uncertain\_initialvalue until I made a change to the tag group. I'm reading these tags via a script to populate a table, using the system.tag.readBlocking() method. I assumed this would "lease" the tags and get new values when the script executed. Is this not the case? I've been trying to find the answer in the manuals and at IU but the information doesn't get that detailed.

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**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [April 1, 2025, 12:40pm UTC](https://forum.inductiveautomation.com/t/does-system-tag-readblocking-trigger-a-leased-tag-to-get-a-new-value/104510/2 "2025-04-01T12:40:10Z")

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No, system.tag.readBlocking never does anything but give you the current value of the tag.