Not sure of the cause. TCS IMTY laser lock its lock point 15min prior, but quickly found it again so that doesnt seem to be the issue.

I could not get the lockloss tool to work, I got the error:

"RuntimeError: Low level daq error occured [13]: Requested data were not found.
There is a gap in H1:GRD-ISC_LOCK_STATE_N"

I will see if I can dig up anything on that error after locking.