I have come across this ’INFORMATIONAL’ event log message a few times and after much banging of heads (mine in particular), Microsoft has a hot fix for the following message:

Event Type: Information
Event Source: BizTalk Accelerator for HL7
Event Category: None
Event ID: 4119
Date: 3/10/2010
Time: 2:35:25 PM
User: N/A
An empty batch was received with fragmentation turned on. The 1st 1kb of the message is


Time: 3/10/2010 2:35:24 PM

However, when searching for this, I was not apparent that it is referring to the following KB 973910 article