SET_FIX_VARIABLE

Prescribe a fixed value to a variable. The variable is considered as a constant at the optimization, usually after successful optimization runs for some specific variables (for some of the phases in the system). Such fixed variables can also be set back for further optimization run by using SET_OPTIMIZING_VARIABLE.

Syntax

SET_FIX_VARIABLE

Prompts

Variable number: <Variable number(s)>

Specify the number of the variable. It is possible to give a range by giving two numbers with a hyphen in between (no spaces allowed), e.g. l. The parameters within the limits are set fixed to their current values (no question of values).

 

Start value /xxxx.xxxxx/: <A value to be fixed>

Specify a numerical value to be fixed for the selected variable (only when one variable number is specified at the previous prompt). The current value for the selected variable is shown as default.

If a range of variable numbers is specified at the previous prompt, this question is not prompted, and the current values are used as fixed values.