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error object reference not set to an instance of an object

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Posted on by LG-17062105-0

I am trying to update a field value on the list item that triggered the flow. I am receiving the following error in the Update Item action and my list item is not updating. Any help is greatly appreciated.

Flow:

Triggered when a sharepoint list item is created

Step 1 is Get Items - filtered to only pull the 1 previous record related to the newly created row (to pull the previous days mileage)

Step 2 is For Each loop (because Get Items pulls a list even thou it is currently limited to pulling 1 row)

Step 3 (inside the For Each Loop) is Update Item (keeping all values from the trigger record but calculating todays mileage using todays entry minus the previous days mileage)(using the sub function)

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eetuRobo 3,587 Super User 2025 Season 1 on at

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error object reference not set to an instance of an object

Can you share a screenshot of your flow so its easier to troubleshoot. Also your flow sounds like a cloud flow even though you posted the question on desktop flow section

Could be that your Update item is using array that has one item in it.

Since your flow is supposed to use only one item you could remove the For Each loop and just use first() -function to get the first item only. Or use "Get item" -action instead of "Get items"