Maura Nurinda

Ah i see, i think that's the error comes from. So I have set of n indexed with j. The length is 6, with 0 is depot and 1-5 is the node that needs to be visited. Since generally we use lots of 1-5 d...

Yes, it shows the schedule for that nodes and vehicle in specific timing period. If it's giving y[i,j,k] = 1, it means that vehicle i is visiting node j in period k. Hence, the variable 'e' shows t...

Hi Riley, noted. Thank you very much for your help on this, I can understand where the error within my code. After giving several revisions, the code looks like this. I also put several constraint ...

Hi Riley,  If it's like that, so what's the '.X' define in the code? Also, the constraint that you created previously for decision variable "e" is not creating the boundaries that need to be fulfil...

Hi Riley,  Thank you for your help, after changing the pickup-produce constraint as you suggested, the model is not infeasible anymore. But I still have this difficulty in the attribute e error. Co...

For giving more context, In the pickup-produce constraint, I would like to create a scenario where everytime the vehicles visit that node in specific time (node can only be visited once for all per...

Hi Riley, Thank you for the heads up! Yes you are right, I did some mistake while writing the inventory constraints. After giving revision of it, it still giving infeasible result and showing this ...