Hi, i have found the reason behind infeasibility, there were corrections to be made in one of the constraint. Thank you for helping me. I need further assistance on this, I will display my project here on what i have done.

1. I have declare the ingredients and the foods lists.

2. The sodium content is of the food, not of the ingredient. After declaring the ingredients, i am connecting the ingredients with the food that it belongs to (in parameter called as recipe):

Simple example, bread slice the ingredient not much, so its just bread slice. For tuna sandwich it is bread slice, tuna and mayonnaise i have tick across and i thought AIMMS can read the ingredients as the subset of the respective foods.

I find it somehow correct by the way AIMMS show this.

3. Linking with the constraint

Callback the parameter “recipe” in one of the constraint as i am using Linear programming model to solve this problem. And the decision variable X includes (days, s-meals, food, ingredients, patients).

4. The result im expecting should be somehow like below when i extract from AIMMS for respective patients: 

5. But what i obtained now is as per below:

Question: How come AIMMS cannot read the connected ingredients to the food it belongs?