What Does “Flow Fault Occurred” Mean in Salesforce?
The “Flow fault occurred” error appears when a Salesforce Flow encounters an unexpected issue during execution and does not have proper fault handling in place.
This usually means:
- A Flow element failed, and
- Salesforce couldn’t recover or redirect the error gracefully
As a result, the Flow stops and displays an error message to the user or logs the fault in Flow Interviews.
Common Error Message
You may see messages like:
Flow fault occurred
or
An unhandled fault has occurred in this flow
Sometimes Salesforce also shows:
- The Flow name
- The element where the fault happened
- The record involved
Where This Error Commonly Occurs
- Record-Triggered Flows
- Screen Flows
- Auto-launched Flows
- Flows triggered by Process Builder
- Background Flows running on record updates
Why “Flow Fault Occurred” Happens
1. Missing or Invalid Field Values
The Flow tries to:
Example
- Update a required field without a value
- Write an invalid picklist value
- Save data in the wrong format
2. Permission or Access Issues
The running user may lack:
- Edit access to the object
- Field-level security
- Record access due to sharing rules
3. Validation Rule Failure
If a validation rule fires during a Flow update, Salesforce stops execution and throws a fault.
4. Record Locking Issues
Flows running on high-volume objects may hit:
- Record lock conflicts
- Concurrent updates
5. Missing Fault Handling
If the Flow does not include Fault paths, Salesforce cannot redirect the error gracefully and instead throws a generic fault.
How to Fix “Flow Fault Occurred” (Admin Steps)
✅ Step 1: Check Flow Error Details
Go to: Setup → Flows → Flow Interviews
- Open the failed interview
- Note the element where the fault occurred
- Review the error message carefully
✅ Step 2: Add Fault Paths to Flow Elements
For every Create, Update, or Delete element:
- Click the element
- Add a Fault connector
- Redirect to an error-handling screen or logging action
This prevents abrupt failures.
✅ Step 3: Verify Object & Field Permissions
Check:
- Object-level access
- Field-level security
- Record sharing access
Make sure the Flow runs in System Context, if required.
✅ Step 4: Review Validation Rules
Temporarily disable or test validation rules that:
- Interfere with automation
- Require fields not populated by the Flow
Add conditional logic if needed.
✅ Step 5: Test the Flow with Real Scenarios
Test:
- Different user profiles
- Different record types
- Edge cases (blank values, updates, bulk actions)
Best Practices to Prevent Flow Faults
- Always add Fault paths
- Avoid hard-coded values
- Use Decision elements before updates
- Test Flows with non-admin users
- Keep Flows simple and modular
Who Should Handle This Error?
-
🎯 Primary Role
Salesforce Admin
Admins are responsible for:
- Flow design
- Automation logic
- Error handling
🤝 Secondary Role
- Salesforce Developer (only if Apex or triggers are involved)
Quick Fix Checklist (Admin-Friendly)
- ✔ Review Flow Interviews
- ✔ Identify failing element
- ✔ Add Fault connectors
- ✔ Verify permissions
- ✔ Test with multiple users