Which feature cannot be used from the automation writer port?

• A. Merge Action
• B. Split-Merge Block
• C. Filter messages
• D. Run a Workspace

Answer: (A)

The automation writer port works with a single inbound message stream and offers actions that control that flow or trigger other workspaces. The one that cannot be used from this port is the merge action, because merging implies combining multiple input streams into one, which isn’t something the writer port handles directly. It’s designed to process or route a single message at a time (and to trigger other workspaces or apply simple routing), whereas merging requires coordinating multiple streams, something you typically do inside a workspace or a split-merge block rather than at the writer port level.

You can still use actions like Run a Workspace to invoke another workspace, or Filter messages to decide whether to pass or drop the current message, and Split-Merge Block to manage branching and later reassembly within the automation flow.