I'm not sure what happened, but as of a few weeks ago, every single task (mostly 16t, but now also YAFU. Except for small composites) error out after it appears the full computation is completed 2-3 days for the 16t.

All of them error out with this:

<core_client_version>7.10.2</core_client_version>
<![CDATA[
<message>
(unknown error) - exit code 195 (0xc3)</message>
<stderr_txt>

Here's an example task before they go away: http://yafu.myfirewall.org/yafu/result.php?resultid=3204406

Any ideas?