Found x1tripleteststand had time frozen at Wednesday evening (July 18).  Could not get models to run, even after restarting the tripleteststand computer and cycling power with the I/O chassis power switch.  Appeared the DAC and ADC cards could not be found.

Ended up turning off power to computer, then turning off power supply to I/O chassis, then powering back up in order.  Started IOP model, then user model, both started properly.

Given the timing, possibly a lightning induced power glitch?