ERROR_LOCAL_USER_SESSION_KEY - 1303 (0x517)
No encryption key is available. A well-known encryption key was returned.
Updated: Feb 21, 2026
Technical Meaning
The error code ERROR_LOCAL_USER_SESSION_KEY with the numeric value 1303 and hexadecimal representation 0x517 indicates that a required encryption key is not available. Specifically, it suggests that an attempt was made to access or use a well-known encryption key, but such a key could not be found.
Error Details
This error typically arises in scenarios where the system expects a specific encryption key for session management or data protection purposes. The absence of this key can disrupt operations that rely on secure communication or data handling mechanisms.
Usage Context
The context in which this error might occur includes, but is not limited to:
- Secure session establishment
- Encryption and decryption processes
- Key-based authentication mechanisms
- Data integrity checks requiring encryption keys
Developer Interpretation
Developers should interpret this error as an indication that the necessary encryption key is missing or unavailable. This could be due to a variety of reasons, such as incorrect configuration, system state issues, or operational errors.
Common Causes
- Incorrect Configuration: The system might not have been properly configured with the required keys.
- Key Management Issues: There may be problems in key management, such as key deletion or corruption.
- System State: The system's state might indicate that a necessary key is missing due to previous operations or failures.
Related Errors
ERROR_NO_SUCH_KEY(1234, 0x4C2): Indicates the absence of any encryption key.ERROR_INVALID_PARAMETER(1259, 0x4E7): Suggests that a parameter passed to an API is incorrect or invalid.
FAQ
Q: What does ERROR_LOCAL_USER_SESSION_KEY mean?
A: It indicates that no encryption key is available for the operation being performed. A well-known encryption key was expected but not found.
Q: How can I resolve this error?
A: Ensure that all necessary keys are correctly configured and available in the system. Check configuration settings, key management practices, and system state to identify any issues.
Summary
The ERROR_LOCAL_USER_SESSION_KEY (1303, 0x517) is a generic error indicating an absence of required encryption keys for secure operations. Developers should focus on ensuring proper key management and configuration to avoid this issue.