| Message Code | ASA-4-720033 |
| Severity | Warning |
| Description | (VPN-unit) Failed to queue add to message queue. |
| Explanation | This message indicates that system resources may be running low. An error is encountered when VPN failover subsystem attempts to queue an internal message. unit—Either “Primary” or “Secondary.” |
| User Action | This may be a temporary condition indicating that the system is under heavy load and VPN failover subsystem cannot allocate resource to handle incoming traffic. This error condition may goes away if the current load of the system reduces and additional system resources become available for processing new messages again. |
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