Ensure that the SharePoint VSS writer is reporting content databases on the front-end web server. 2)Verify that the SQL Server ...

1)Ensure that the SharePoint VSS writer is reporting content databases on the front-end web server. 
2)Verify that the SQL Server VSS writer is enabled and running in a healthy state on all the back-end SQL Server machines. 
3)Verify if some of the databases that are part of this SharePoint farm are already being protected by DPM. To protect the SharePoint farm, remove these databases from protection and delete their existing recovery points.

Ensure that the protection group and protection group set exist, and that the protection group is not assigned to a different ... Ensure that the protection groups and protection group set exist, and that the protection groups are not assigned to a different ... Ensure that the replica is in "replica creation pending" state before recovering. For details on recovering a DPM server, ... Ensure that the replica is in "replica creation pending" state before recovering. For details on recovering a DPM server, ... Ensure that the SharePoint VSS writer is reporting content databases on the front-end web server. 2)Verify that the SQL Server ... Ensure that the SharePoint VSS writer is reporting content databases on the front-end web server. 2)Verify that the SQL Server ... Ensure that the SharePoint VSS writer is reporting content databases on the front-end web server. 2)Verify that the SQL Server ... Ensure that the virtual machine that you are recovering is shut down, and then retry the recovery. If the error persists, ... Ensure that the virtual machine that you are recovering is shut down, and then retry the recovery. If the error persists, ...