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Power Platform Community / Forums / Power Automate - Building Flows / Flow Failure due to Ba...
Power Automate - Building Flows
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Flow Failure due to Bad Request for "since input not specified"

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Posted on by ninjaryder1st 232

When using the trigger for "item created or modified" my subsequent step "Get Changes for an Item (properties only)" throws an error for Bad Request on the list item being modified and retrieved.  I'm correctly entering the dynamic content for "ID", "since" and "until" tokens as well.

 

I'm getting error in the flow for "Get Changes for an Item" that my "input isn't specified". 

 

ninjaryder1st_1-1617644027433.png

 

ninjaryder1st_4-1617644693058.png

 

 

 Though I also don't see the specific field or "missing input" that the flow is seeking and what and where this input should be entered in the build below.  

ninjaryder1st_2-1617644084921.png

 

Can anyone assist in working through this?

  • Verified answer
    ninjaryder1st Profile Picture
    ninjaryder1st 232 on at
    Re: Flow Failure due to Bad Request for "since input not specified"

    thanks @fchopo,

     

    I actually found another forum noting I had an incorrect trigger action.    I needed to use "when an item or file is modified" rather than "an item is created or modified".   

  • fchopo Profile Picture
    fchopo 7,968 Super User 2025 Season 1 on at
    Re: Flow Failure due to Bad Request for "since input not specified"

    Hello @ninjaryder1st 

    In the since field you should specifiy the latest version minus 1 using the following expression:

    sub(int(triggerOutputs()?['body/{VersionNumber}']),1)

    Remember that the "Get changes for an item..." it will only work if versioning is enabled in the SharePoint list, and that expression will only work if version number is greater than 1.

    Hope it helps!

    Ferran

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