AIMMS ERROR: Warning: After zero iterations CPLEX 12.7.1 concluded that an integer solution to VRP does not exist.

  • 8 April 2020
  • 1 reply

I am currently working on a vehicle routing problem and get this error when i try to run it. Does anyone know how to fix it. 

I have also attached the excel file where the data is stored. (Ignore the emission zones column)


Kind regards


1 reply

Userlevel 5
Badge +5

Hello, you modeled this as MINLP which might not be necessary. Are you required to solve this assignment using a MINLP ? If not, did you review this example ?

What are the different constraints that you need to satisfy, like 1. all customer demand must be met, 2. only one vehicle must satisfy all demand at a customer 3. trucks start at and come back to depots etc. 


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