# Event for parameter change or tag deleted

**URL:** <https://forum.inductiveautomation.com/t/event-for-parameter-change-or-tag-deleted/77684>\
**Category:** Ignition\
**Created:** [August 10, 2023, 6:59am UTC](https://forum.inductiveautomation.com/t/event-for-parameter-change-or-tag-deleted/77684 "2023-08-10T06:59:53Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![majad](https://avatars.discourse-cdn.com/v4/letter/m/df788c/32.png) [@majad](https://forum.inductiveautomation.com/u/majad)\
**Post date:** [August 10, 2023, 6:59am UTC](https://forum.inductiveautomation.com/t/event-for-parameter-change-or-tag-deleted/77684/1 "2023-08-10T06:59:53Z")

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Hello,

i have a memory Tag which holds a specific Parameter for every Tag. Whenever i create a tag i add a row with the path and the parameter to the dataset of the memory tag. This works.  
Now i want to track changes if the parameter is changed (at this moment i do this through a tag restart but i hope there is a better option) or if the tag is deleted. So is there any event or something like that which i can catch to implement a script for this case?

Thank you

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**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:** [August 10, 2023, 11:52am UTC](https://forum.inductiveautomation.com/t/event-for-parameter-change-or-tag-deleted/77684/2 "2023-08-10T11:52:29Z")

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No, tag properties (and UDT parameters) do not generate any change events. There are some interfaces in the SDK that might work, but expect fragility and likely memory leaks if you attach jython listeners to the tag manager.