Email Processing

A friend sent me an email that has no attachments or imbedded icons or pictures.  However, it is an attachment to an email that states:

 

"This message has been processed by Symantec's AntiVirus Technology.

work on the new pages. was not scanned for viruses because of the error: DECERR_CHILD_EXTRACT


For more information on antivirus tips and technology, visit http://ses.symantec.com/"

 

What does this mean?  Do I need to inform the sender?

 

Thanks for your collective help.

 

 

Kelly