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[TunTun]

Hi everyone. This is my first time using Unisim software. I am simulating the swing pressure distillation process to separate ThF and water. The system will consist of 2 columns: low pressure column and high pressure column. When I simulate the low pressure column, I activated the reflux ratio and distillate rate values, then the system converged. But when I simulate the high pressure column, the system only converged when I activated the reflux ratio and reboiler duty. And then the distillate rate value was 71.33 while the value I wanted was 77.35. Please show me how to fix the error or tell me where I went wrong.