Patch assessment not bringing any results back

Question

Hi 
 I've inherited a Sophos Enterprise installation and have recently started to push out the patch assessment module from the console to some 30+ Windows servers. 
 Some have been restarted, all are now showing patch assessment is active, with the version number,

So I left everthing overnight ( the patch policy is set to 8 hours ) and when I run the patch assessment events viewer, there is nothing there. What should I check ?

I have set the Patch status to be All and get nothing there either. I can't believe all the servers have every patch installed as we are not running WSUS or any active patching routine. 
 
 thanks

Mark Byrne · Answer

Sophos resolved this issue with a custom SQL script ran against the SophosPatch52 DB - so not an easy fix but many thanks to everyone that helped. We backed up the database then ran the script, which seems to reset the database, upgrade the status map and then delete criteria, agent platform information and OS version. It then inserted this information back into the database again.