Salesforce Screen Flows are a powerful automation tool — but what happens when something goes wrong mid-flow? That’s where Fault Paths come into play.
In this blog, we’ll guide you step-by-step through implementing fault paths in a Salesforce Screen Flow, enabling you to display custom error messages, optionally log those errors, and ensure a better experience for both users and admins.
What is a Fault Path in Salesforce Flow ?
A Fault Path is a special connector in Flow Builder that is triggered only when a Flow element fails for example:
- A record fails to create (due to a validation rule or required field),
- An Apex action throws an exception,
- A missing or null field causes an issue.
Instead of showing Salesforce’s generic error messages, you can catch the error and display a friendly custom screen, log the failure, and alert your admin.
Followings are steps to create screen flow using fault paths for giving Contact Creation Example
- Creating a New Screen Flow
- Navigate to Setup → Flow → Click New Flow
- Select Screen Flow and click Create
- Creating an Input Variable
- Click New Resource → Select Variable
- API Name: varRecordId
- Data Type: Text
- Check Available for Input
- Get Account Details
- Add a Get Records element → Label it Get Account Info
- Select Account as the object
- Filter: Id Equals
- Store only the first record into a variable named accountRecord
- Add a Screen for Contact Details
- Add a Screen element → Label it Enter Contact Info
- Add the following input fields:
- Text: First Name
- Text: Last Name
- Email: Email
- Checkbox: Is Primary
- These fields will let the user input contact details.
- Create the Contact Record
- Add a Create Records element → Label it
Create Contact - Choose Contact as the object
- Map the fields:
- First Name → firstName
- Last Name → lastName
- Email → email
- AccountId → varRecordId
- IsPrimary__c → isPrimary (custom field if used)
- Add a Create Records element → Label it
- Setting up the Fault Path
- Click the Create Contact element
- Click the three-dot icon and choose Add Fault Path.
- A red line (fault connector) will appear.
- Capturing the Error Message
- Drag the red connector to a new Assignment element
- Create a new Variable:
- API Name: varErrorMessage
- Data Type: Text
- Check Available for Input
- In the Assignment element:
- Assign flow fault Error Message to varErrorMessage.
- Create a new Variable:
- Drag the red connector to a new Assignment element
- Adding an Error Screen
- Add a new Screen → Label it Error Message
- Add a Display Text component with a friendly message: “We were unable to create the contact. Please check the entered values.”
- Optionally append the system error: “System Error: {!varErrorMessage}”
- Add a Success Screen
- Add another Screen → Label it Success Message
- Display text: “Related Account Contact is created”
- Connecting the Elements
- Connect Start → Enter Contact Info → Create Contact
- Connect Create Contact → Success Message
- Connect Create Contact → Assignment → Error Message
- Save and Activate the Flow
- Click Save → Give your flow a name like Create Contact with Error Handling
- Activate the flow
- Now, add the flow to a Lightning page.
- Here, we’ve have added the Screen flow in lightning page in Account record page for Contact creation.
- For testing, try leaving a required field empty or entering an invalid email to trigger the fault path and confirm that the error screen appears.
- If all the inputs are valid, the flow will create the Contact and show the success message.
By using Fault Paths in your Salesforce Screen Flows, you create a smooth and user-friendly experience even when something goes wrong. It’s an essential feature for every admin or consultant building robust flows in production orgs.
By following the above blog instructions, you will be able to learn “How to Implement Fault Paths in Salesforce Screen Flow”. If you still have queries or any related problems, don’t hesitate to contact us at salesforce@greytrix.com. More details about the Product are available on our website and Salesforce AppExchange.
We hope you may find this blog resourceful and helpful. However, if you still have concerns and need more help, please contact us at salesforce@greytrix.com.
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