[Schwimmy]

Dear all,

I have one question concerning an iterative routine with fortran user function.
What I want to realize is shown at the attached thumbnail:
Each timestep I want to update one value, which depends on the value from the previous timestep and some other parameters. All parameters are global ones so it would be perfect, if they are stored in single expressions.

Do I have to work with stack pointers or how can I realize this?

Cheers,
Schwimmy