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All, the default, specifies that transactions leave an activity following all output paths that exit the activity. Transactions terminate if the activity has no output paths. If the activity has multiple output paths, transactions duplicate into one transaction for each output path (see duplicate transactions).
For example, an activity called Materials in stock has two output paths and the output option is set to All. A transaction that enters the activity duplicates into two separate transactions that simultaneously exit the two output paths. These transactions proceed in parallel, but eventually must be joined back together.
You can also explicitly duplicate transactions using the Duplicate or Duplicate Member On Completion Task options (see Define Activity Outputs).
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