| Message Code | ASA-4-720009 |
| Severity | Warning |
| Description | (VPN-unit) Failed to create version control block. |
| Explanation | This message appears when the VPN failover subsystem fails to create a version control block. This step is required for VPN failover subsystem to find out the backward compatible firmware versions for the current release. The unit is either “Primary” or “Secondary.” |
| User Action | The VPN failover subsystem cannot be started. This may be caused by initialization problems of other subsystems. Search the system log message for any sign of system-wide initialization problems. |
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