[Guocq]

When I am doing a transient simulation, I want to change the pressure condition at the outlet in real time. To achieve this function, I created an expression and hope to change the value of the expression at the end of each time step through Junction Box Routine. An error occurred during the CFX-Solver calculation process, indicating that the POKED command was used incorrectly. I suspect that the input parameter CDANAM in the POKED command is set incorrectly. I hope someone can explain in detail the specific usage of POKED in my application scenario. How should I enter the required parameters so that the program can run normally?

[ghorrocks]

Why can't you do this using a CEL expression and not use User Fortran at all? That is much simpler and you will get less errors.

If you have to use User Fortran - why aren't you doing this using a User CEL Function? This is the simplest form of User Fortran and you do not need to get involved in the memory management - which is poorly documented and complex. A User CEL Function is much simpler.

In other words, you are doing this the hard way, and there are at least two easier ways of doing it.