求助解决方法
Aspen运算出现如下错误如何解决？Block: H4 Model: HEATER
PARAMETERS OF RKS EQUATION OF STATE ARE MISSING.
TC IN DATA SET 1 IS MISSING FOR NH6PO4;
A NOMINAL VALUE OF 507.40 K HAS BEEN ASSUMED.
PC IN DATA SET 1 IS MISSING FOR NH6PO4;
A NOMINAL VALUE OF0.29688E+07 PA HAS BEEN ASSUMED.
OMEGA IN DATA SET 1 IS MISSING FOR NH6PO4;
A NOMINAL VALUE OF0.29600 HAS BEEN ASSUMED.
ZRA IN DATA SET 1 IS MISSING FOR NH6PO4;
A NOMINAL VALUE OF0.31470 HAS BEEN ASSUMED.
****PROPERTY PARAMETER ERROR
ERRORS ENCOUNTERED IN CALCULATION OF VAPOR MIXTURE PROPS USING
OPTION SET RK-SOAVE FOR PHIMX
! Calculations stopped because of missingproperty parameters
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