Have sorted this problem, but will detail somes notes so as others can see what was happening;
After sucessfully working for around 3 months, our CSC SSM card was starting to notify of not being able to download updates for any products with an error code of 28.
Troubleshooting steps as follows;
1. Logged into ASA via SSH/Telnet
2. Open Console to SSM (session 1)
3. Enabled root access to SSM
4. Logged out of SSM and logged back in again as root
5. Browse to directory /opt/trend/isvw/tmpfs/AU/AU_Log
6. Performed cat on file TmuDump.txt
Noticed that instead of polling the Trend Website for updates, it was pointing to our local Trend Micro Control Manager IP Address which had fallen over. After Unregistering the TMCM in the SSM configuration and trying updates again, everything went through.
Since then, have restored the TMCM machine and reconfigured the SSM to point to again.
Confirmed behavour by taking down the TMCM box again and attempting to update signatures. Surely this should be documented somewhere that if using a TMCM console, that loss of availability to the service will cause this error.
Regards,
Andrew Boening