ERROR_IPSEC_KEY_MODULE_IMPERSONATION_NEGOTIATION_PENDING - 13901 (0x364D)
A negotiation running as the security principle who issued the connection is in progress.
Updated: Feb 21, 2026
Technical Meaning
This error code indicates that a security negotiation is currently in progress for the security principle associated with an IPsec connection. The negotiation process involves establishing mutual trust between the communicating parties, and this error suggests that such a process has been initiated but is not yet complete.
Error Details
The numeric value of the error is 13901 (0x364D), and it pertains to an ongoing security negotiation within the IPsec key module. This implies that the system is in the process of verifying or establishing a secure connection, possibly involving certificate validation or other cryptographic operations.
Usage Context
This error typically occurs during the establishment of an IPsec tunnel or when attempting to establish a secure connection using IPsec. It indicates that the necessary security checks are being performed but have not yet been completed.
Developer Interpretation
Developers should interpret this error as a temporary condition indicating that the system is in the process of completing a security negotiation. This does not necessarily indicate an issue with the application or configuration, but rather that the system requires additional time to complete the necessary cryptographic operations before allowing the connection to proceed.
Related Errors
- ERROR_IPSEC_KEY_MODULE_NOT_FOUND (13902)
- ERROR_IPSEC_KEY_MODULE_OPEN_FAILED (13903)
- ERROR_IPSEC_PROCESS_AUTHORIZATION_FAILURE (13904)
FAQ
Q: What does this error mean?
A: This error indicates that a security negotiation is currently in progress for the security principle associated with an IPsec connection.
Q: Is this error critical?
A: No, it is not critical. The system is performing necessary cryptographic operations and will complete them shortly.
Q: How can I resolve this issue?
A: Wait for the negotiation to complete or ensure that all required security certificates are properly configured and available.
Summary
The ERROR_IPSEC_KEY_MODULE_IMPERSONATION_NEGOTIATION_PENDING error indicates an ongoing security negotiation within the IPsec key module. This is a temporary condition and does not necessarily indicate an issue with the application or configuration. Developers should interpret this as a normal part of the secure connection establishment process.