Getting 'Element not defined' Error for ExtGraphNodes in OPL model

Question

I'm working on an optimization problem using IBM's OPL (Optimization Programming Language). I have defined a set called ExtGraphNodes in my model file, but when I try to use it in my data file, I encounter an error stating that the element is not defined.

I have declared the set as follows in my model file: {TimedNode} ExtGraphNodes; In my data file, I define the set using: ExtGraphNodes = { <"A1", 0>, <"A1", 1>, ... }; However, I still receive an error saying "Element 'ExtGraphNodes' not defined." I expected that with the correct declaration, the model should recognize the set.

my code

Chris Bracchi · Accepted Answer · 2024-11-04 15:53:48Z

0

You must declare your set as follows in your model file:

{TimedNode} ExtGraphNodes = ...;

See the doc about Initializing sets.

I hope this helps.

Chris.

answered Nov 4, 2024 at 15:53

Chris Bracchi

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