ERROR_LOG_EPHEMERAL - 6634 (0x19EA)
The operation requires a non-ephemeral log, but the log is ephemeral.
Updated: Feb 21, 2026
Technical Meaning
The ERROR_LOG_EPHEMERAL error code indicates that an operation was attempted on a log file or directory that is configured as ephemeral, but the operation requires a non-ephemeral log. Ephemeral logs are typically used for temporary storage and may be deleted automatically after a certain period.
Error Details
This error occurs when a function or API call expects to operate on a persistent log, but encounters an ephemeral log instead. The specific context in which this error is generated can vary depending on the application or system component that initiated the operation.
Usage Context
The ERROR_LOG_EPHEMERAL error code is relevant primarily within the context of Windows logging mechanisms and APIs such as the Event Log service, where logs are managed to ensure data integrity and persistence. Ephemeral logs might be used for temporary storage or testing purposes, but they cannot meet the requirements of operations that need a persistent log.
Developer Interpretation
Developers should interpret this error code as an indication that the operation being attempted is not compatible with the current state of the log. This could mean that the application is trying to write to a log file or directory that has been configured for temporary use, which does not support the intended operation.
Related Errors
ERROR_LOG_CORRUPTED(0x19E8): Indicates corruption in the log file or directory.ERROR_LOG_READ_ONLY(0x19EB): The log is read-only and cannot be modified.
FAQ
Q: What does the ERROR_LOG_EPHEMERAL error mean?
A: It means that an operation was attempted on a log configured as ephemeral, but the operation requires a non-ephemeral log. Ephemeral logs are temporary and may not support certain operations.
Q: How can I resolve this issue?
A: Ensure that you are operating on a non-ephemeral log by checking the configuration of your logging system or application settings.
Summary
The ERROR_LOG_EPHEMERAL error code is specific to situations where an operation requires a persistent log, but encounters an ephemeral one. Developers should be aware of this distinction and ensure that their operations are compatible with the current state of the log being used.