Here is the event ID.

Log Name:      Symantec Enterprise Vault

Source:        Enterprise Vault

Date:          1/5/2013 6:45:40 PM

Event ID:      28944

Task Category: Storage File Watch

Level:         Error

Description:

The 3rd party storage system application 'Hitachi Content Platform (HCP) Streamer' has logged the following message:

 CStreamerObject::Info method failed

Reason = 0x80004005

Description = Object not found. StoreIdentifier = 'evroot/4B0543502693F94384572083D5D0C7YB/2013/Jan/00/789494a5-38e0-48ef-adee-5920e4268cf3/23_01_25/00010'.

ConnectionManager::Set_Curl_Operation method error (Curl error) Reason = 52 - Empty reply from server

It looks as if the item is retried later since it can be found in the SavesetStore table with the correct StoreIdentifier.  A Dtrace will show that it does get an OK response on the next attempt, but only the error appears in the Event log.    

The event might need to be a Warning and have verbiage to state a retry will occur for the item.  It should also include the archive name  and the filepath\name of the item so it can be verified without the need to run SQL queries. 

Other 28944 events show different details for different errors and their details should be looked at as well.