Is a Trojan stopping Sophos running full scan?

Hi guys

I recently was presented with a whole bunch of Trojans that had been sent to my Google Mail account in iMail. Apple had quarantines some of them to the Spam folder though not all but Sophos identified all of the Trojans and I clicked 'clean up. The issue kept appearing however and I am not sure whether this is because the Trojan is self-replicating or because there were a lot of them

I decided to run a full scan but something keeps holding that up: checking my log there are several messages of this type:

• com.sophos.intercheck: Issue: Could not scan /private/tmp/68f01de2.$$$
  com.sophos.intercheck: An unexpected error occurred

  And similar. This seems to be what is stopping the scan

  Can anyone advise

I am wondering whether it is linked to the Torjans themselves all of which appear to be of this type:

• com.sophos.intercheck: 2012-01-03 14:30:58 +0000 Threat: 'Troj/JSRedir-EK' detected in /Users/benamponsah68/Library/Mail/V2/Mailboxes/Junk (Gmail).mbox/C49321ED-C846-415A-BC11-115D7CA05705/Data/1/3/1/Attachments/131557/2/kizjfxyvpun.html

Any help appreciated as I am stumped

com.sophos.intercheck: Access to the file denied