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Best way to get around an array error Out of Bounds

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Posted on by ktownshend

I have a flow that works most of the time. When the email subject line has 4 array items, it runs no issue. But I do have some subject lines that are shorter and that's when the flow fails.

Looking for a better work around so that the flow will ignore CustName4 variable and output later in my flow if it's null, blank, outside the bounds (0,3) of array, etc.

I have several splits setup to pull out just the pieces I need from the Subject Line and I have a filter on the trigger also.

Happy to try to show my workflow if that helps.

Any thoughts or work arounds would be greatly appreciated.

Here's the error message I get and the Code view.

InvalidTemplate

Unable to process template language expressions in action 'CustName4' inputs at line '0' and column '0': 'The template language expression 'outputs('Further_Split_for_customer_num_Name')[4]' cannot be evaluated because array index '4' is outside bounds (0, 3) of array. Please see https://aka.ms/logicexpressions for usage details.'.

Code View:
{
  "type": "InitializeVariable",
  "inputs": {
    "variables": [
      {
        "name": "CustName4",
        "type": "string",
        "value": "@{outputs('Further_Split_for_customer_num_Name')[4]}"
      }
    ]
  },
  "runAfter": {
    "CustNme3": [
      "Succeeded",
      "TimedOut",
      "Skipped",
      "Failed"
    ]
  },
  "metadata": {
    "operationMetadataId": "2b22ddea-ff75-4496-b8e5-8352c9bcdf05"
  }
}

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CFernandes 8,402 Most Valuable Professional on at

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Can you share the screenshot of your Power Automate? One option would be get the Length(which returns a number) and then build a logic. on top of it using a condition or a switch

length(outputs('Get_items')?['body/value'])

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ktownshend 83 on at

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The flow starts from a mailbox that holds emails that come in with the subject line of:

13682 US Foods - Boston Seabro Cultur Pricing Oct 2024 or similar wording

I split the subject line on the space to break it down:

split(outputs('Email_Subject_as_Text'), ' ')

I then split that further to pull out what I don't need

split(outputs('Email_Subject_as_Text'), 'Cultur Pricing')

Then i grab the [0] of the array

variables('Split on Cultur Pricing')[0]

So I can break that out by the space

split(outputs('Split_to_Customer_num_name'), ' ')

This gets me the Customer Number and then 3 to 4 pieces for the Customer Name.

Where I'm having the issue is if [4] is outside of the bound for the split,

it's tossing me the error.

How would I effectively use Length in my coding to adapt for this issue?

Screenshots of flow below.

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