The Data ONTAP API interface packages uses XML and from this error there was a failure to parse some response. I suspect some kind of network failure caused the XML document to get truncated which resulted in a failure to parse it and that error. If you see it often I would suspect network errors or instability in the network are to blame.
Maybe you can take a packet trace or use other network troubleshooting techniques to research deeper?
Storage Architect, NetApp EMEA (and author of Harvest)
Blog: It all begins with data
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