# How to pass alarm custom property into calculated alarm roster

**URL:** <https://forum.inductiveautomation.com/t/how-to-pass-alarm-custom-property-into-calculated-alarm-roster/36297>\
**Category:** Ignition\
**Created:** [July 2, 2020, 2:02pm UTC](https://forum.inductiveautomation.com/t/how-to-pass-alarm-custom-property-into-calculated-alarm-roster/36297 "2020-07-02T14:02:17Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![ijustdunnoaname1](https://avatars.discourse-cdn.com/v4/letter/i/c67d28/32.png) [@ijustdunnoaname1](https://forum.inductiveautomation.com/u/ijustdunnoaname1)\
**Post date:** [July 2, 2020, 2:02pm UTC](https://forum.inductiveautomation.com/t/how-to-pass-alarm-custom-property-into-calculated-alarm-roster/36297/1 "2020-07-02T14:02:17Z")

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I’m trying to create an alarm pipeline for a UDT using a calculated roster. However, I’m having trouble getting the machine ID parameter from the UDT passed into the calculated roster when the alarm event occurs.

I created a custom property within the triggering alarm which references the machine\_id integer tag that I’d like to pass into the calculated roster script. However, I can’t find how to reference this custom property within the calculated roster script.

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**Author:** ![ccontreras](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/ccontreras/32/40931_2.png) [@ccontreras](https://forum.inductiveautomation.com/u/ccontreras)\
**Post date:** [March 8, 2023, 8:46pm UTC](https://forum.inductiveautomation.com/t/how-to-pass-alarm-custom-property-into-calculated-alarm-roster/36297/2 "2023-03-08T20:46:27Z")

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From the Calculated Roster, you can access alarm associated data from the event object by doing this:  
event["nameOfAssociatedDataProperty"]