It seems that, even when you tell the OSM to not perform the sizing calculation with simulation control, the OpenStudio SDK does not translate this into the IDF. To get around this, I'm taking an iron-fisted approach where I just don't write the design days into the OSM/IDF when simulation control says to not perform zone sizing.
This produces the desired behavior, though I should note that the simulation is only successful when the model is unconditioned or the only HVAC is IdealAir with NoLimit sizing and no exonomizer.
It seems that, even when you tell the OSM to not perform the sizing calculation with simulation control, the OpenStudio SDK does not translate this into the IDF. To get around this, I'm taking an iron-fisted approach where I just don't write the design days into the OSM/IDF when simulation control says to not perform zone sizing.
This produces the desired behavior, though I should note that the simulation is only successful when the model is unconditioned or the only HVAC is IdealAir with NoLimit sizing and no exonomizer.