Windows error 13018 (ERROR_IPSEC_MM_FILTER_PENDING

Status / error code:		Category:

Constant name:
Source:	Operating System:
Description: The Main Mode filter is already pending deletion.

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ERROR_IPSEC_TUNNEL_FILTER_NOT_FOUND	ERROR_IPSEC_TRANSPORT_FILTER_PENDING_DELETION

ERROR_IPSEC_MM_FILTER_PENDING_DELETION

ERROR_IPSEC_MM_FILTER_PENDING_DELETION (0x000032DA) The requested Main Mode filter has entered a deletion transition but has not been removed from all policy-engine references yet. Retrying create/delete operations immediately can produce confusing duplicate or not-found results.

What to check

Wait for policy reconciliation and verify the active rule set before submitting another change.
Check whether Group Policy refresh or a configuration-management agent is reapplying the same filter.
If the state persists, inspect the dependent policy and current Main Mode security associations before restarting services.

Get-NetIPsecMainModeRule

Microsoft: Get-NetIPsecMainModeRule

Microsoft: Get-NetIPsecMainModeSA

Microsoft: IPsec/IKE system error codes

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