Defining magnitude of load, displacement, etc. using variable dependent
expression (e.g. position, time, etc) doesn't work if solution is not active.
An an example : such error message appears for expression 5*ug_val(z) that is
used to define pressure's magnitude:
"Pressure depends on z whose value cannot be determined"
Solution
This is design intended.
The reason behind it is that some expressions can depend on the solution
(type), maybe not position, but time and frequency as example can. That's why,
NX presumes that every expression could have solution specific parameters, so
it won't support evaluation of expressions outside the context of the active
solution.
Hence, activate a solution before entering variable/parameter dependent
expression in (magnitude) field entry.
Notes