Error Messages/42526

Error Text

The right-hand side of the No_plane_reduction constraint evaluated to a non-numeric value,
«null», at coordinate:
 
    Time=2015
 
The optimization begin solved was created using DefineOptimization from My_NLP.

Cause

This message occurs when a non-linear optimization is being solved. During this solution process, the solver plugs solution candidates into the decision variables, and evaluates the constraints. For some value that tried, the indicated constraint evaluated to something that contained a non-numeric value, and hence the error. The error provides several important clues to help you pinpoint the problem. It shows what the bad value is («null» in this example), whether it occurred on the left-hand or right-hand side, and what coordinate it occurs at when the left-hand or right-hand side is array-valued.

Remedy

Adjust your model to elimate the source of the non-numeric value.

If you are using «Null» to indicate that certain positions in an array-valued constraint are not to be used as constraints, then replace them with a vacuous constraint. An example is this -- instead of the constraint expression:

(if use_it then f(x) else null) = b

use:

(if use_it then f(x) else b) = b