i think there is something wrong with lic file. becuase when i run pvtsim and select different fluid , the same fluid will appear in the " Edit current" option of Char fluid (Fluid management Tab) . and same result are produced during calculations. the fluid is as follows:


Component mole percent
N2 0.546
CO2 2.826
C1 55.566
C2 8.594
C3 5.745
iC4 1.009
nC4 2.435
iC5 0.895
nC5 1.24
C6 1.581
C7 2.552
C8 2.747
C9 1.699
3.542
1.788
1.434
1.15
1.312
1.193
0.912
0.726
0.507