Troubleshooting steps
Check application logs, verify scripts, restart application
HMI Error Codes
Red Lion E4 – Runtime error
Runtime error
Details
Red Lion E4 error on HMI indicates runtime error. Application error, script error, execution failure. Check application logs, verify scripts, restart application.
Error typeruntime
MeaningRuntime error
Typical causesApplication error, script error, execution failure
SolutionsCheck application logs, verify scripts, restart application
SeverityHigh
Catalog references
Where this appears
Red LionE4
Utilities
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FAQ
Common questions
What does E4 mean on Red Lion HMI?
E4 on Red Lion HMI indicates runtime error. Application error, script error, execution failure.
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