ERROR_IPSEC_TUNNEL_FILTER_PENDING_DELETION - 13020 (0x32DC)
The tunnel filter is pending deletion.
Updated: Feb 21, 2026
Technical Meaning
The ERROR_IPSEC_TUNNEL_FILTER_PENDING_DELETION error code indicates that a tunnel filter associated with Internet Protocol Security (IPSec) is currently in the process of being deleted. This typically means that an attempt to delete or modify the tunnel filter has been initiated, but the operation has not yet completed.
Error Details
This error code is specific to the Windows operating system and pertains to the IPSec service, which manages security policies for IP traffic. The tunnel filter in question is a component of the IPSec policy that defines how certain types of IP traffic should be secured or filtered.
Usage Context
The ERROR_IPSEC_TUNNEL_FILTER_PENDING_DELETION error can occur when an attempt to delete or modify a tunnel filter through the Windows API fails because the operation has not yet completed. This situation might arise in scenarios where multiple operations are being performed on the same IPSec policy, such as during configuration changes or maintenance tasks.
Developer Interpretation
Developers should interpret this error code as an indication that the requested operation (deletion of a tunnel filter) is currently pending and cannot be completed immediately. This typically means that the system is in the process of deleting the specified tunnel filter, but the deletion has not yet been finalized.
Related Errors
ERROR_IPSEC_TUNNEL_FILTER_NOT_FOUND(13021): Indicates that a requested tunnel filter does not exist.ERROR_IPSEC_TUNNEL_FILTER_ALREADY_EXISTS(13022): Indicates that an attempt was made to add a tunnel filter that already exists.
FAQ
Q: What causes the ERROR_IPSEC_TUNNEL_FILTER_PENDING_DELETION error?
A: This error occurs when an attempt to delete or modify a tunnel filter is initiated, but the operation has not yet completed. It typically indicates that the system is in the process of deleting the specified tunnel filter.
Q: How can I resolve this issue?
A: The issue will resolve itself once the deletion process completes. If you need to perform additional operations on IPSec policies, ensure that all pending deletions or modifications are completed before proceeding.
Summary
The ERROR_IPSEC_TUNNEL_FILTER_PENDING_DELETION error code is a specific technical indicator used by Windows when attempting to delete or modify an IPSec tunnel filter. It signifies that the operation has been initiated but not yet finalized, and developers should be aware of this state during configuration changes or maintenance tasks involving IPSec policies.