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Loop Workflow sends every payload to the selected workflow and collects the returned values in the same order.

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Inputs

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Output

Each item becomes Data In in the child workflow. A child run without Return Data contributes null to the result list.
Iterations run sequentially, not in parallel. This preserves order but means total runtime grows with the number and duration of child runs.
If any child run fails, this action fails and does not return partial results. Recursive workflow calls are also rate-limited to prevent infinite loops.