Hello,
having ANS messages in the server activity log is actually
a known defect with TSM servers (versions 5.5, 6.1 and 6.2).
See here for the description and fix levels.

http://www-304.ibm.com/support/docview.wss?uid=swg1IC76265

Rejean Larivee
IBM Tivoli Storage Manager Software Support


"ADSM: Dist Stor Manager" <ADSM-L AT vm.marist DOT edu> wrote on 05/30/2012
11:01:14 AM:

> From: Richard Sims <rbs AT BU DOT EDU>
> To: ADSM-L AT vm.marist DOT edu
> Date: 05/30/2012 11:17 AM
> Subject: Re: Different treatment of ANS and ANE messages in the
> server activity log
> Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT vm.marist DOT edu>
>
> Neil -
>
> My question would be: What are ANS messages doing in the server Activity
Log?
> From everything I know, client-initiated messages conveyed to the
> TSM server should be logged in the Activity Log as ANE messages,
> where they can be distributed to event logging receivers.  I can't
> recall ever seeing any ANS messages in the Activity Log.  This may
> be the result of a software error, if it is occurring.
>
> If ANS messages are appearing in the server Activity Log, I can see
> how they would be disregarded in severity level interpretation as
> being foreign matter.
>
>    Richard Sims
>