Root Cause: This is a limitation of AE. An XML document must not exceed 16 Million nodes. Errors of this type can also pop up when accessing other big objects such as Workflows. This limit will be removed in a future verison.
An XML document must not exceed 16 million nodes, which is what caused the above symptoms. Errors of this type can also occur with other sizable objects such as very large workflows.
This is a current limitation within the Automation Engine that will be removed in a future version.
Fix Status: No Fix