When invoking external services (like an API callout) from a Flow, it is critical to add proper fault paths to handle unexpected failures, especially since such callouts can fail due to service unavailability, timeouts, or validation issues. Using the “Add Fault Path” option in Flow allows developers to gracefully handle the error (e.g., show a user-friendly message, log the error, or retry).
Correct Option:
A. ✅ Adding an error handler ensures the user experience is preserved even if the external call fails.
Incorrect Options:
B. While running in a separate transaction might help, this is not configurable directly in Flow.
C. Apex is more flexible but not necessary unless the requirement exceeds Flow’s capabilities.
D. Process Builder cannot make external callouts.
Reference Extract from Salesforce Help – Add Fault Handling to Your Flow:
“Add a fault path to any element that may fail, such as external services or DML operations, to ensure the flow doesn’t fail silently.”
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