I actually saw a flood of these type messages across multiple systems...
enough to where I raised a red flag and declared a potential virus attack.
Within minutes of sounding the alarm it was discovered that it was actually
the anti-virus team performing a "vulnerability test" of the environments.
(would have been nice if they had given me a heads up on that...)

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Richard Sims
Sent: Wednesday, April 04, 2012 2:32 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] Another queer error message

Gary - You probably have some Internet miscreant going at your client port
with non-TSM software.  Windows boxes tend to be honeypots without trying.
Various systems at your site may evidence such probing, in their logs.
Given that you are at a recent TSM level, it should not be the case of more
advanced TSM software attempting to access a lower level implementation
using verbs not understood by the older client.

   Richard Sims