"The Finish File Present Too Long" can be caused by too many WU finishing at exactly the same time. A single BOINC client doesn't have enough time to do all the clean up - stop the WU, generate the output file, close the slot, and erase the WU from the HDD. It doesn't happen that often on the 24 thread machine but it DOES happen if too many WU complete at the same time.

There are 2 fixes:
1. Run 2 BOINC clients.
2. SUSPEND all but 6-8 WU. After one minute RESUME 6-8 more WU. One minute later RESUME the rest.

This is a VERY common problem on the higher thread count machines.