## Error message

Message logs in the Management Console of the cloud failover appliance (CFA) show the following error:

VMwareBackupJobRunner: error encountered during VM backup: com.rvx.vmware.exceptions.VmwareBackupException: com.rvx.vmware.exceptions.RunnerStatusFailedException: com.rvx.nativ.vmware.vixexceptions.VixEDISKOUTOFRANGE: You have requested access to an area of the virtual disk that is out of bounds


## Error description

This error is generated when the Changed Block Tracking is attempting to gather data from a VMDK, and VMware believes the data is outside the range of the VMDK. This error shows up when the VMDK size is increased.

## Steps to resolve

Reset CBT on the VM to allow backups to run correctly.