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ID: KB0036
Product Version: 6.0
Last Modified: 31 Dec 2015


Error message is stating that an error has occurred while backing up/replicating/recovering one or more disks of the VM.


Possible Cause

DNS Issues

  • There might be a problem with resolving ESXi host DNS name on the machine where the Transporter is installed.
  • ESXi host might have multiple IPs in different networks, while some of them are not reachable by the Transporter.


  • Source and target ESXi hosts can be pinged from the appropriate Transporter (using both DNS name and IP).
  • If ping fails, edit the HOSTS file on the Transporter machine and specify the proper DNS resolution rules.

Closed Ports

NAKIVO Backup & Replication requires the following TCP ports to be open:


  • Required ports are not used by other applications.
  • Required ports are not blocked by firewall.

Unexpected Server Outage

  • Source or target ESXi host might be disconnected or powered off.
  • Source or target Transporter might be disconnected or powered off.