PRO II空分模拟出错

现在我要模拟一个空分，上塔的再沸器和下塔的冷凝器热负荷相同，可是总是收敛不了。哪位有空帮忙给指导一下？谢谢了先keyword 文件：$ Generated by PRO/II Keyword Generation System $ Generated on: Mon Jul 21 19:30:41 2008TITLE PROJECT=exercise001, USER=llxTOLERANCE STREAM=,,1E-5DIMENSION METRIC, TEMP=K, PRES=ATM, STDTEMP=273.15, STDPRES=1SEQUENCE SIMSCICALCULATION RVPBASIS=APIN, TVP=310.93, RECYCLE=ALLCOMPONENT DATALIBID 1,NITROGEN/2,AR/3,OXYGEN, BANK=SIMSCI,PROCESSASSAY CONVERSION=API94, CURVEFIT=IMPROVED, KVRECONCILE=TAILSTHERMODYNAMIC DATAMETHOD SYSTEM=SRK, DENSITY(L)=IDEAL, SET=HIGHP  KVAL(VLE)  SRK 1,3,-0.01089,0,0  SRK 1,2,0,0,0  SRK 2,3,0.01697,0,0METHOD SYSTEM=SRK, DENSITY(L)=IDEAL, SET=LOWP, DEFAULT  KVAL(VLE)  SRK 1,3,-0.00694,0,0  SRK 1,2,0.0056,0,0  SRK 2,3,0.01574,0,0STREAM DATAPROPERTY STREAM=1, TEMPERATURE=278, PRESSURE=6, PHASE=M,