HNAS may report errors when a file with size between 1GB and 2GB is sent to SPFS for scanning.

"Virus scan failed (status Errored, the virus scan engine reported RESPMOD operation timed-out')."
"Virus scan failed (status Errored, the virus scan engine reported "")"

The issue happens because HNAS closes TCP connection before finishing sending scan file data, and then reports failure in virus scan.