OK, since it's now clear that you're using an Enterprise version of VirusScan and the problem isn't related to a Virus Removal issue, I'll move your post to a more appropriate forum. Your thread will now be in the "General Corporate Network/Business" Enterprise section where ePO is frequently discussed. You can access your thread from either forum location.
As to the error, have you checked out each of the machines which are throwing the error.. Maybe the detections are related to Potentially Unwanted Programs, your settings aren't set to remove PUP's, and therefore aren't being deleted.. A physical check of those computers in question might be in order.
Hope this helps.
Grif