Duplicated Trigger

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Posted on by TP-08120359-0

I tested the flow by sending an email with an attachment. However, the trigger appears to duplicate the flow, resulting in seven attachment inputs. The first input produces the expected output, inputs 2-6 result in errors, and the 7th input yields a null data output.What setting do I need more in order to get only the first input. I have tried to turn off the split on setting but it appear to have 1 input but with an error. ExpressionEvaluationFailed

The execution of template action 'For_each' failed: the result of the evaluation of 'foreach' expression '@triggerOutputs()?['body/attachments']' is of type 'Null'. The result must be a valid array.

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SwatiSTW 807 Super User 2026 Season 1 on at

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The bug is that your flow is treating the attachments array incorrectly. Either it is misconfigured (e.g., Split On is causing duplication), or the array is empty/null, leading to errors in the "For each" loop when trying to process it.

Simple Fix:

1. Go to your trigger ("When a new email arrives in a shared mailbox (V2)") and disable the "Split On" setting in the trigger's advanced settings.

2. Add a Compose action after the trigger with this expression:
@triggerOutputs()?['body/attachments']

3. Add a Condition action to check if the attachments exist. Use this expression in the condition:
@not(empty(outputs('Compose')))
If True (Yes): Proceed to the "For each" loop.
If False (No): Do nothing or terminate the flow.

4. Update the "For each" loop to use the output of the Compose action. Use this expression for the loop input:

outputs('Compose')

5. the loop, ensure all actions process one attachment at a time.

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SamLed 2,338 Moderator on at

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Hi,

Just add @not(empty(@triggerOutputs()?['body/attachments'])) as trigger condition. Need no condition in flow and Apply to each will not fail as flow will only be triggered when mails have attachments.

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