Mia culpa, I changed the name of the second spare PEM ADC channel at the corner station to H1:PEM-CS_ADC_4_27_16K_OUT_DQ but forgot to change the actual rate in the DAQ block. I corrected this, restarted h1pemcs and restarted the DAQ.
On the DAQ restart: mx_stream restarted needed on h1oaf0 and h1pemmx. h1fw1 kernel crashed on startup, needed power cycle.