EmailXtender Error (SRVCMD_READ_BLOB_VIA_MSGID)

Hello

We have SourceOne installed with EmailXtender connected in one of our environments. During one day we found that the service was broken from unkonwn reason. I checked windows and EMC logs on SourceOne's side and found nothing uncommon, except of few errors relative to running jobs.

But on EmailXtender's side I found the following errors, I'm wondering if it may be relative to service break or not. Can anyone provide me any information about the error?

Event Type:	Error
Event Source:	EmailXtender
Event Category:	Query
Event ID:	0
Date:		10.10.2011
Time:		13:59:40
User:		N/A
Computer:	Xtender01

Description:

exception in ProcessIncomingCommand SRVCMD_READ_BLOB_VIA_MSGID  thread: 8000

Thanks in advance

Pavel