vRanger fails to backup SteelFusion proxy mounted snapshots.

vRanger fails to backup SteelFusion proxy mounted snapshots with following error message in the Backup Job Summary:

"Error: 3201 - can't open [DC1] DC1/DC1-000001.vmdk"

SteelFusion Core is able to proxy mount VM successfully and does not display any errors or alerts:

Feb 9 11:02:42 GRANITECORE vadp_setup[14538]: [6006016014102D00BDBE13DE8DB0E411/mount_unresolved.INFO] - Successfully mounted VMFS DC1!
Feb 9 11:02:43 GRANITECORE vadp_setup[14538]: [6006016014102D00BDBE13DE8DB0E411/locate_unique_datastore_for_lun.INFO] - Datastore DC1 for naa.6006016014102d00bdbe13de8db0e411 is the one that matches
Feb 9 11:02:43 GRANITECORE vadp_setup[14538]: [6006016014102D00BDBE13DE8DB0E411/locate_unique_datastore_for_lun.INFO] - Size of dup list : 0
Feb 9 11:02:43 GRANITECORE vadp_setup[14538]: [6006016014102D00BDBE13DE8DB0E411/locate_unique_datastore_for_lun.INFO] - Found datastore DC1 successfully for naa.6006016014102d00bdbe13de8db0e411
Feb 9 11:02:43 GRANITECORE vadp_setup[14538]: [6006016014102D00BDBE13DE8DB0E411/mount_unresolved.INFO] - Successfully located the datastore
Feb 9 11:02:43 GRANITECORE vadp_setup[14538]: [6006016014102D00BDBE13DE8DB0E411/vadp_setup.INFO] - Mounted successfully

The issue is due to vRanger's inability to backup a virtual machines with open snapshot. More information can be found in the following Dell KB article.

This problem is affecting only older versions of vRanger up to 6.1. Deleting manually created snapshots or upgrading vRanger to version 7.2 will resolve the issue

SteelFusion Core

Proxy mounted snapshots

vRanger

Backup