Symptom:
The Trend Micro Content Scanning and Security Security Services Module may attempt to update part of its pattern files and send the administrator an error email indicating:

Anti-spam pattern <####> was successfully downloaded and installed.
Unable to copy file . You must manually copy file /opt/trend/isvw/temp/AU/piranhacache/* to path /opt/trend/isvw/lib/mail/cache.

Further investigation shows that the patterns appear to be copied correctly and no action is required on the users part.

Conditions:
This occurs when there is less than 32 MB free in one of the folders of the CSC Filesystem.