ERROR_NO_IMPERSONATION_TOKEN - 1309 (0x51D)
An attempt has been made to operate on an impersonation token by a thread that is not currently impersonating a client.
Updated: Feb 21, 2026
Technical Meaning
The error code ERROR_NO_IMPERSONATION_TOKEN (1309, 0x51D) indicates that a thread attempted to perform an operation on an impersonation token when it was not currently impersonating any client. This implies that the thread must be in an impersonation context before performing certain operations.
Error Details
This error typically occurs during API calls where the thread needs to temporarily assume the security context of another user or process, such as ImpersonateLoggedOnUser or similar functions. If a thread is not currently impersonating any client, attempting to perform an operation that requires an impersonation token will result in this error.
Usage Context
This error code is relevant when dealing with security contexts and token management within the Windows API environment. It highlights the importance of ensuring that threads are correctly configured for impersonation before executing operations that require such a context.
Developer Interpretation
Developers should be aware that this error signifies an attempt to use an impersonation token in a thread that is not currently set up for impersonation. This can occur due to incorrect thread state or improper API usage. Developers must ensure that threads are properly configured and in the correct security context before performing operations that require impersonation.
Related Errors
ERROR_INVALID_PARAMETER(1402, 0x576)ERROR_ACCESS_DENIED(5, 0x5)ERROR_NO_TOKEN(1223, 0x4B7)
FAQ
Q: What does the error code ERROR_NO_IMPERSONATION_TOKEN mean?
A: It indicates that a thread attempted to perform an operation on an impersonation token when it was not currently impersonating any client.
Q: How can I resolve this issue?
A: Ensure that the thread is correctly configured for impersonation before performing operations that require an impersonation token. Check the security context and ensure that the necessary tokens are available.
Summary
The ERROR_NO_IMPERSONATION_TOKEN error code (1309, 0x51D) signifies that a thread attempted to operate on an impersonation token when it was not currently in an impersonation state. This is a specific technical issue related to security contexts and token management within the Windows API environment. Developers should ensure proper configuration of threads for impersonation before performing such operations.