Here is a summary of the 4 spontaneous IPC errors we have seen during the O4 run so far.
| alog | date | details |
| 79913 | 02:08:03 Thu 05sep2024 | long-range-dolphin h1susetmx sender @ |
| 74665 | 11:09:47 Thu 07dec2023 | CS dolphin h1lsc0 sender * |
| 74365 | 05:22:13 Tue 21nov2023 | CS dolphin h1lsc0 sender * |
| 73584 | 18:47:05 Wed 18oct2023 | long-range-dolphin h1susetmx sender @ |
Note that both the * and the @ events are identical pairs of events.
The fact that h1susetmx had todays issue back on Oct 2023 rules out the recent addition of the new LIGO-28AO32 DAC card as being a possible problem.