No replies to this topic

[Ouss]

Hi.

I'm trying to simulate a packed tower RadFrac by ASPEN PLUS after specifying User Transport subroutines ( Fortran subroutines of mass transfer coefficients and interfacial area).

I'm using "pack sizing" feature to customise the correlations that will be used, and "user transport subroutines" to specify the name and parameters of the subroutine.

but when I run the simulation the calculation aborted with this error:

ERROR:
FORTRAN INVALID OPERATION ENCOUNTERED

and

FORTRAN DIVIDE BY ZERO ENCOUNTERED.



Thank you in advance for your guidance.