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Power Platform Community / Forums / Power Automate / How do I add a value t...
Power Automate
Suggested Answer

How do I add a value to a 2D array?

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Posted on by RF-31010754-0 6
I am struggling to do something that I thought might be quite easy. 
 
I have an array called MissingList that I've added several more lists to. 
 
I want to set a particular value in the 2D and have done the following:
 
 
However I get the following error: Parameter 'Into list': Input 'MissingList[1]' can't have trailers.
 
What I might be doing wrong?
Categories:
Building flows
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  • Suggested answer
    Nived_Nambiar Profile Picture
    Nived_Nambiar 18,129 Super User 2025 Season 2 on at
    Hi,
     
    add items to list add an item to the list, in your case it appends a list to master list. So it should be like below
     
     
     
    If you are planning to update the second element of MissingList - use set variable option to do that as shown below
     
     

    Thanks & Regards,
    Nived N

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  • RF-31010754-0 Profile Picture
    RF-31010754-0 6 on at
    Thanks but perhaps I didn't explain myself correctly. 
     
    At the start of the flow, I create a new list called 'MissingList', 
     
    Then in a loop I have the following
     
     
    So I believe that this makes my list called MissingList contain seven lists. What I want to do is to add a value to one of the inner lists - so how do I add an item to the list that is in position 1 in the list called MissingList?
  • Nived_Nambiar Profile Picture
    Nived_Nambiar 18,129 Super User 2025 Season 2 on at
    Hi
     
    For that - you need to use set variable action. see below
     
     
    Here i am adding student list as second element to MissingList variable.
     
     
     

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