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I am optimizing a transportation problem where I want to determine which warehouse to service which customer.

  1. Is there a way to set up the constraints so that a customer's demand can only be satisfied by 1 warehouse(not split up and supplied by multiple warehouses)?

  2. I ran my model without the above constraint. When I check the results, I found that some warehouse capacity constraints were broken. I know there is more than enough total warehouse capacity for the customer demands.

Click here to see a screenshot of my code

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    always put code, data and full error message as text (not screenshot, not link) in question (not comment). Commented Jun 15, 2021 at 0:18
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    I would first tackle point 2. (1) generate an LP file and study it (2) make sure the model is optimal by studying the solver log. Point 1 needs extra binary variables y(i,j) indicating if link i->j is used. Commented Jun 15, 2021 at 7:59
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