The IMC lost lock tonight at about 4:00 AM local time. It is not clear why (no big drift in the control channels).

We had trouble recovering lock this morning, unitl we discovered that there were problems with the windows machine controlling the slow digital system.

After we reset the system, restore the working settings on the common mode board and readjusted the delay line value (I'm stressing this as the default setting after a reset of the system results in almost all the signal being in the Q quadrature, with a consequently unusable error signal... good to keep in mind!), we were able to reacquire lock very easily.