Root Cause: The error message indicates that the network connection was closed during the file transfer. One reason could be a network problem. For example, a short network outage can cause an ftp transfer to terminate as there is no automated error recovery. Problems like this are not a result of defects within the Automic software.
Fix Status: No Fix
A potential workaround would be to create a process loop to retry the transfer for a certain number of retries, as it might work on the 2nd try if the connection is available.
Also an Automic File Transfer would be a better solution as this type of File Transfer does error recovery until the file is transferred successfully.