h1susetmy epics process died after running for a few hours, here is the dmesg output
[12094.731546] h1susetmyepics[17317]: segfault at 5a5c8c0 ip 00007f0fb70f2814 sp 00007fff81a06540 error 4 in libc-2.10.1.so[7f0fb7077000+14c000]
[12095.732645] h1susetmyepics used greatest stack depth: 2984 bytes left
Error 4 = The cause was a user-mode read resulting in no page being found (also known as null pointer dereference)