cooling design supply air temperature error

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Hi everyone, I'm using EnergyPlus. I've designed zones and used unitary system template. I set zone heating setpoint off and zone cooling setpoint for 24C at HVACTemplate:Thermostat (just for cooling and no heating). The error :

* Severe * UpdateZoneSizing: Cooling supply air temperature (calculated) within 2C of zone temperature * ~~~ * ...check zone thermostat set point and design supply air temperatures * ~~~ * ...zone name = L1_GUEST_LOUNGE * ~~~ * ...design sensible cooling load = 49979.41 W * ~~~ * ...thermostat set point temp = 0.000 C * ~~~ * ...zone temperature = 12.927 C * ~~~ * ...supply air temperature = 12.800 C * ~~~ * ...temperature difference = -0.12726 C * ~~~ * ...calculated volume flow rate = 394045.60338 m3/s * ~~~ * ...calculated mass flow rate = 473653.03659 kg/s

When I change cooling design supply air temperature from 12,8C to 34,6C, Its still coming error.

* Severe * UpdateZoneSizing: Cooling supply air temperature (calculated) within 2C of zone temperature * ~~~ * ...check zone thermostat set point and design supply air temperatures * ~~~ * ...zone name = L1_GUEST_LOUNGE * ~~~ * ...design sensible cooling load = 97227.21 W * ~~~ * ...thermostat set point temp = 0.000 C * ~~~ * ...zone temperature = 34.603 C * ~~~ * ...supply air temperature = 34.600 C * ~~~ * ...temperature difference = -2.99108E-003 C * ~~~ * ...calculated volume flow rate = 13529.78784 m3/s * ~~~ * ...calculated mass flow rate = 16263.15594 kg/s

What should I do to fix this error? Please help me. I'm in hurry for my project. Thank you.