An Integration Procedure requires a Response Action to formally structure and send data back to the calling element. The scenario states that the debug log shows the DataRaptor successfully retrieved data, confirming the data exists within the procedure's internal data JSON during execution. The fact that the final response is empty indicates that no mechanism was configured to take this internal data and map it to the final output. The Response Action is the standard and required component for this purpose; its absence is the most direct and likely cause of an empty response.

A. The DataRaptor Action did not have the add response to Response JSON property set to true.

This property (correctly named "Add Response to Data JSON") controls if the step's output is added to the data JSON. While unchecking it would hide data from the final response, the fundamental cause of an empty response is the missing Response Action itself.

B. The Response cannot be previewed directly.

This is factually incorrect. The Preview tab in the Integration Procedure designer is the primary tool for testing execution and viewing the final response JSON.

D. The AccountId used for the preview is invalid.

This is contradicted by the evidence provided in the question, which states, "The developer sees the data extract by the DataRaptor in the Debug Log." Data extraction would fail with an invalid ID.

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1. Salesforce OmniStudio Documentation

"Integration Procedure Actions

" Section: Response Action.

This official guide states

"An Integration Procedure must have a Response Action to return data to a tool or process. The Response Action must be the last action in the Integration Procedure." This directly supports the conclusion that a missing Response Action results in no data being returned.

2. Salesforce OmniStudio Documentation

"Integration Procedure Data JSON

" Section: How Data Flows.

This document explains that actions add their output to the main data JSON tree. The Response Action then reads from this tree to create the final

trimmed output. This clarifies that even if data exists internally (as seen in the debug log)

it is not sent as the response without a Response Action.

3. Salesforce OmniStudio Documentation

"DataRaptor Extract Action in an Integration Procedure

" Section: Action Properties.

The documentation details the "Add Response to Data JSON" property

confirming its role is to merge the DataRaptor's output into the IP's data JSON. This supports the reasoning that while this property is important for data flow

the Response Action is what governs the final output.