These are generally common issues. I would suggest you to check the amcore dat and regular dat along with the content as you have mentioned. They also have engine files too. However, first, I would suggest going to the mcafee download site and download manually the v2 and v3 dats and content for epo and check them in manually to verify that there is nothing wrong in the repository for those entries.
The path specified is a temporary location and is deleted when pull task completes or fails. Sometimes it depends on time of day that you run the pull - we may be replicating to it at that time. You can try again at a later time and alternately try ftp to hit another site to see if it succeeds. We recommend running the pull task a couple of times a day during different times of day to ensure you hit it at an up to date time.
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