FMV2840E
Incremental backup using snapshot difference is not supported for Data ONTAP file server
version 'version.modification.submodification'.
Upgrade the file server 'file-server-name' to Data ONTAP version '7.3' or later
in order to perform incremental backup operations using snapshot difference.
Explanation
The file server specified is not at the Data ONTAP version that supports snapshot difference API.
System action
Processing stops.
User response
Upgrade the file server to Data ONTAP version 7.3 or later and retry the operation.